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CHEMISTRY (621 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 14)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 43)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 21)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 26)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 41)
ACS Nano     Full-text available via subscription   (Followers: 274)
ACS Photonics     Full-text available via subscription   (Followers: 14)
ACS Symposium Series     Full-text available via subscription  
ACS Synthetic Biology     Full-text available via subscription   (Followers: 24)
Acta Chemica Iasi     Open Access   (Followers: 5)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chimica Slovenica     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 6)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 6)
Advanced Functional Materials     Hybrid Journal   (Followers: 57)
Advanced Science Focus     Free   (Followers: 5)
Advances in Chemical Engineering and Science     Open Access   (Followers: 66)
Advances in Chemical Science     Open Access   (Followers: 18)
Advances in Chemistry     Open Access   (Followers: 21)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19)
Advances in Drug Research     Full-text available via subscription   (Followers: 23)
Advances in Environmental Chemistry     Open Access   (Followers: 5)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 17)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 11)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 25)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 16)
Advances in Polymer Science     Hybrid Journal   (Followers: 43)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 19)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 3)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 64)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 17)
American Journal of Chemistry     Open Access   (Followers: 30)
American Journal of Plant Physiology     Open Access   (Followers: 11)
American Mineralogist     Hybrid Journal   (Followers: 15)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 165)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 244)
Annales UMCS, Chemia     Open Access  
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 5)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 9)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal   (Followers: 2)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 9)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 31)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 2)
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Full-text available via subscription   (Followers: 350)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 10)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 2)
Biomacromolecules     Full-text available via subscription   (Followers: 21)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 128)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 84)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 3)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 71)
Catalysis for Sustainable Energy     Open Access   (Followers: 8)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 10)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 18)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 73)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 22)
Chemical Reviews     Full-text available via subscription   (Followers: 191)
Chemical Science     Open Access   (Followers: 24)
Chemical Technology     Open Access   (Followers: 24)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 56)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 24)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 32)
Chemistry & Industry     Hybrid Journal   (Followers: 7)
Chemistry - A European Journal     Hybrid Journal   (Followers: 163)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 16)
Chemistry and Materials Research     Open Access   (Followers: 21)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Hybrid Journal   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 44)
Chemistry of Materials     Full-text available via subscription   (Followers: 254)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 19)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 11)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 11)
Chromatographia     Hybrid Journal   (Followers: 24)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 6)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Cogent Chemistry     Open Access   (Followers: 1)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 11)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 22)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Communications Chemistry     Open Access  
Composite Interfaces     Hybrid Journal   (Followers: 7)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 11)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 10)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 3)
Copernican Letters     Open Access   (Followers: 1)
Corrosion Series     Full-text available via subscription   (Followers: 6)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Croatica Chemica Acta     Open Access  
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Chromatography     Hybrid Journal  
Current Green Chemistry     Hybrid Journal  
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Microwave Chemistry     Hybrid Journal  
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 14)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 69)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 3)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  

        1 2 3 4 | Last

Journal Cover
Advances in Colloid and Interface Science
Journal Prestige (SJR): 1.977
Citation Impact (citeScore): 8
Number of Followers: 19  
  Full-text available via subscription Subscription journal
ISSN (Print) 0001-8686
Published by Elsevier Homepage  [3163 journals]
  • High pressure-elevated temperature x-ray micro-computed tomography for
           subsurface applications
    • Authors: Stefan Iglauer; Maxim Lebedev
      Pages: 393 - 410
      Abstract: Publication date: June 2018
      Source:Advances in Colloid and Interface Science, Volume 256
      Author(s): Stefan Iglauer, Maxim Lebedev
      Physical, chemical and mechanical pore-scale (i.e. micrometer-scale) mechanisms in rock are of key importance in many, if not all, subsurface processes. These processes are highly relevant in various applications, e.g. hydrocarbon recovery, CO2 geo-sequestration, geophysical exploration, water production, geothermal energy production, or the prediction of the location of valuable hydrothermal deposits. Typical examples are multi-phase flow (e.g. oil and water) displacements driven by buoyancy, viscous or capillary forces, mineral-fluid interactions (e.g. mineral dissolution and/or precipitation over geological times), geo-mechanical rock behaviour (e.g. rock compaction during diagenesis) or fines migration during water production, which can dramatically reduce reservoir permeability (and thus reservoir performance). All above examples are 3D processes, and 2D experiments (as traditionally done for micro-scale investigations) will thus only provide qualitative information; for instance the percolation threshold is much lower in 3D than in 2D. However, with the advent of x-ray micro-computed tomography (μCT) – which is now routinely used – this limitation has been overcome, and such pore-scale processes can be observed in 3D at micrometer-scale. A serious complication is, however, the fact that in the subsurface high pressures and elevated temperatures (HPET) prevail, due to the hydrostatic and geothermal gradients imposed upon it. Such HPET-reservoir conditions significantly change the above mentioned physical and chemical processes, e.g. gas density is much higher at high pressure, which strongly affects buoyancy and wettability and thus gas distributions in the subsurface; or chemical reactions are significantly accelerated at increased temperature, strongly affecting fluid-rock interactions and thus diagenesis and deposition of valuable minerals. It is thus necessary to apply HPET conditions to the aforementioned μCT experiments, to be able to mimic subsurface conditions in a realistic way, and thus to obtain reliable results, which are vital input parameters required for building accurate larger-scale reservoir models which can predict the overall reservoir-scale (hectometer-scale) processes (e.g. oil production or diagenesis of a formation). We thus describe here the basic workflow of such HPET-μCT experiments, equipment requirements and apparatus design; and review the literature where such HPET-μCT experiments were used and which phenomena were investigated (these include: CO2 geo-sequestration, oil recovery, gas hydrate formation, hydrothermal deposition/reactive flow). One aim of this paper is to give a guideline to users how to set-up a HPET-μCT experiment, and to provide a quick overview in terms of what is possible and what not, at least up to date. As a conclusion, HPET-μCT is a valuable tool when it comes to the investigation of subsurface micrometer-scaled processes, and we expect a rapidly expanding usage of HPET-μCT in subsurface engineering and the subsurface sciences.
      Graphical abstract image

      PubDate: 2018-06-07T06:26:23Z
      DOI: 10.1016/j.cis.2017.12.009
      Issue No: Vol. 256 (2018)
  • Auxiliary soft beam for the amplification of the elasto-capillary coiling:
           Towards stretchable electronics
    • Authors: Paul Grandgeorge; Arnaud Antkowiak; Sébastien Neukirch
      Pages: 2 - 9
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): Paul Grandgeorge, Arnaud Antkowiak, Sébastien Neukirch
      A flexible fiber carrying a liquid drop may coil inside the drop thereby creating a drop-on-fiber system with an ultra-extensible behavior. During compression, the excess fiber is spooled inside the droplet and capillary forces keep the system taut. During subsequent elongation, the fiber is gradually released and if a large number of spools is uncoiled a high stretchability is achieved. This mechanical behaviour is of interest for stretchable connectors but information, may it be electronic or photonic, usually travels through stiff functional materials. These high Young's moduli, leading to large bending rigidity, prevent in-drop coiling. Here we overcome this limitation by attaching a beam of soft elastomer to the functional fiber, thereby creating a composite system which exhibits in-drop coiling and carries information while being ultra-extensible. We present a simple model to explain the underlying mechanics of the addition of the soft beam and we show how it favors in-drop coiling. We illustrate the method with a two-centimeter long micronic PEDOT:PSS conductive fiber joined to a PVS soft beam, showing that the system conveys electricity throughout a 1900% elongation.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.08.011
      Issue No: Vol. 255 (2018)
  • On the extent of surface stagnation produced jointly by insoluble
           surfactant and thermocapillary flow
    • Authors: Andrey Shmyrov; Aleksey Mizev; Vitaly Demin; Maxim Petukhov; Dmitry Bratsun
      Pages: 10 - 17
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): Andrey Shmyrov, Aleksey Mizev, Vitaly Demin, Maxim Petukhov, Dmitry Bratsun
      We consider the effect of a partially contaminated interface on the steady thermocapillary flow developed in a two-dimensional slot of finite extent. The contamination is due to the presence of an insoluble surfactant which is carried away by the flow and forms a region of stagnant surface. This problem, first studied in the classical theoretical paper by Carpenter and Homsy (1985, J. Fluid Mech. 155, 429), is revisited thanks to new experimental data. We show that there is a qualitative agreement between above theory and our experiments: two different regions simultaneously coexist on the surface, one of which is free from surfactant and subject to vigorous Marangoni flow, while the other is stagnant and subject to creeping flow with the surface velocity smaller about two orders of magnitude. We found, however, significant disagreement between theory predictions for the extent of a stagnant surface region and newly obtained experimental data. In this paper, we provide an explanation for this discrepancy demonstrating that the surface temperature distribution is far from suggested earlier. Another effect, not previously taken into account, is a possible phase transition experienced by the surfactant. We obtain a correct analytic solution for the position of the edge of the stagnation zone and compare it with the experimental data.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.08.010
      Issue No: Vol. 255 (2018)
  • Transport velocity of droplets on ratchet conveyors
    • Authors: Hal R. Holmes; Karl F. Böhringer
      Pages: 18 - 25
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): Hal R. Holmes, Karl F. Böhringer
      Anisotropic ratchet conveyors (ARC) are a type of digital microfluidic system. Unlike electrowetting based systems, ARCs transport droplets through a passive, micro-patterned surface and applied orthogonal vibrations. The mechanics of droplet transport on ARC devices has yet to be as well characterized and understood as on electrowetting systems. In this work, we investigate how the design of the ARC substrate affects the droplet response to vibrations and perform the first characterization of transport velocity on ARC devices. We discovered that the design of the ARC device has a significant effect on both the transport efficiency and velocity of actuated droplets, and that the amplitude of the applied vibration can modulate the velocity of transported droplets. Finally, we show that the movement of droplet edges is not continuous but rather the sum of quantized steps between features of the ARC device. These results provide new insights into the behavior of droplets vibrated on asymmetric surface patterns and will serve as the foundation for the design and development of future lab-on-a-chip systems.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.08.009
      Issue No: Vol. 255 (2018)
  • A fast and accurate Langmuir-type polymer microtensiometer
    • Authors: Pieter Gijsenbergh; Robert Puers
      Pages: 26 - 33
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): Pieter Gijsenbergh, Robert Puers
      A semi-flexible polymer microtensiometer for local surface pressure measurements of Langmuir monolayers is presented. The current device geometry and read-out method via image analysis result in a theoretical accuracy of ±0.02mN⋅m−1 for a dynamic range between 0 and 75mN⋅m−1. The tensiometer sensitivity and dynamic range are easily tunable as they are solely based on the tensiometer spring dimensions. Finite element simulations are used to determine the response time of 20ms for a subphase viscosity of 1mPa⋅s. A poroviscomechanical model of the sensor is composed and the subphase viscosity is shown to dominate the transient behavior. The tensiometer performance is verified in a Langmuir trough by applying rapid local surface pressure oscillations. A Wilhelmy plate is used as an independent measurement tool and the results of both techniques correlate well.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.08.007
      Issue No: Vol. 255 (2018)
  • Interfacial tensiometry and dilational surface visco-elasticity of
           biological liquids in medicine
    • Authors: V.B. Fainerman; D.V. Trukhin; Igor I. Zinkovych; R. Miller
      Pages: 34 - 46
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): V.B. Fainerman, D.V. Trukhin, Igor I. Zinkovych, R. Miller
      Dynamic surface tensions and dilational visco-elasticity are easy accessible parameters of liquids. For human body liquids, such as urine, blood serum, amniotic fluid, gastric juice, saliva and others, these parameters are very characteristic for the health status of people. In case of a disease the composition of certain liquids specifically changes and the measured characteristics of dynamic surface tension of the dilational surface elasticity and viscosity reflect these changes in a clear way. Thus, this kind of physico-chemical measurements represent sensitive tools for evaluating the severity of a disease and can serve as control tool for the efficiency of applied therapies. The overview summarises the results of a successful work over about 25years on this subject and gives specific insight into a number of diseases for which the diagnostics as well as the therapy control have been significantly improved by the application of physico-chemical experimental techniques.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.08.002
      Issue No: Vol. 255 (2018)
  • Metal losses in pyrometallurgical operations - A review
    • Authors: Inge Bellemans; Evelien De Wilde; Nele Moelans; Kim Verbeken
      Pages: 47 - 63
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): Inge Bellemans, Evelien De Wilde, Nele Moelans, Kim Verbeken
      Nowadays, a higher demand on a lot of metals exists, but the quantity and purity of the ores decreases. The amount of scrap, on the other hand, increases and thus, recycling becomes more important. Besides recycling, it is also necessary to improve and optimize existing processes in extractive and recycling metallurgy. One of the main difficulties of the overall-plant recovery are metal losses in slags, in both primary and secondary metal production. In general, an increased understanding of the fundamental mechanisms governing these losses could help further improve production efficiencies. This review aims to summarize and evaluate the current scientific knowledge concerning metal losses and pinpoints the knowledge gaps. First, the industrial importance and impact of metal losses in slags will be illustrated by several examples from both ferrous and non-ferrous industries. Throughout the remainder of this review, the main focus will be put on the particular issues in copper industry. In a second section, the different types of metal losses in slags will be discussed. Generally, metal losses in slags can be subdivided into two types: chemical losses and physical losses. The fundamental insights concerning the responsible mechanisms will be discussed for each type. Subsequently, an overview of the most frequently used techniques for research investigations of the losses will be given. In a fourth section, a more detailed overview will be given on the post-processing treatment of metal-containing slags, i.e. performing slag cleaning operations. The most frequently applied methods will be discussed.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.08.001
      Issue No: Vol. 255 (2018)
  • Surface tension- and buoyancy-driven flows across horizontally propagating
           chemical fronts
    • Authors: R. Tiani; A. De Wit; L. Rongy
      Pages: 76 - 83
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): R. Tiani, A. De Wit, L. Rongy
      Chemical reactions can interplay with hydrodynamic flows to generate various complex phenomena. Because of their relevance in many research areas, chemically-induced hydrodynamic flows have attracted increasing attention in the last decades. In this context, we propose to give a review of the past and recent theoretical and experimental works which have considered the interaction of such flows with chemical fronts, i.e. reactive interfaces, formed between miscible solutions. We focus in particular on the influence of surface tension- (Marangoni) and buoyancy-driven flows on the dynamics of chemical fronts propagating horizontally in the gravity field.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.07.020
      Issue No: Vol. 255 (2018)
  • Magnetocapillary self-assemblies: Locomotion and micromanipulation along a
           liquid interface
    • Authors: G. Grosjean; M. Hubert; N. Vandewalle
      Pages: 84 - 93
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): G. Grosjean, M. Hubert, N. Vandewalle
      This paper presents an overview and discussion of magnetocapillary self-assemblies. New results are presented, in particular concerning the possible development of future applications. These self-organizing structures possess the notable ability to move along an interface when powered by an oscillatory, uniform magnetic field. The system is constructed as follows. Soft magnetic particles are placed on a liquid interface, and submitted to a magnetic induction field. An attractive force due to the curvature of the interface around the particles competes with an interaction between magnetic dipoles. Ordered structures can spontaneously emerge from these conditions. Furthermore, time-dependent magnetic fields can produce a wide range of dynamic behaviours, including non-time-reversible deformation sequences that produce translational motion at low Reynolds number. In other words, due to a spontaneous breaking of time-reversal symmetry, the assembly can turn into a surface microswimmer. Trajectories have been shown to be precisely controllable. As a consequence, this system offers a way to produce microrobots able to perform different tasks. This is illustrated in this paper by the capture, transport and release of a floating cargo, and the controlled mixing of fluids at low Reynolds number.
      Graphical abstract image

      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2017.07.019
      Issue No: Vol. 255 (2018)
  • Corrigendum to “Zinc oxide nanoparticles: synthesis, antiseptic activity
           and toxicity mechanism” Adv Colloid Interface Sci 249 (2017) 37-52
    • Authors: A. Król; P. Pomastowski; K. Rafińska; V. Railean-Plugaru; B. Buszewski
      First page: 100
      Abstract: Publication date: April 2018
      Source:Advances in Colloid and Interface Science, Volume 254
      Author(s): A. Król, P. Pomastowski, K. Rafińska, V. Railean-Plugaru, B. Buszewski

      PubDate: 2018-04-25T02:35:12Z
      DOI: 10.1016/j.cis.2018.04.006
      Issue No: Vol. 254 (2018)
  • Evaluation of particle charging in non-aqueous suspensions
    • Abstract: Publication date: Available online 19 June 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Jarl B. Rosenholm
      Factors influencing the sign and size of effective surface (zeta) potential in suspensions of very low dielectric constants are evaluated. For non-aqueous suspensions it was found that Gutmann's donor number (DN = negative Lewis type molar acid-base adduct formation enthalpy) was successfully related to zeta potential changes, similarily as pH is optimal for aqueous suspensions. Negative molar proton dissociation enthalpy (Brϕnsted type HD number), negative hydrogen bond enthalpy (HB number), logarithmic hydrogen bond equilibrium constant (molar Gibbs free energy), standard reduction potential of solvated protons (E o (H L +/H 2)), electrolytic dissociation potential of water (E o (H 2 O/H 2, O 2)) and electron exchange Fermi potentials could equally well be related to zeta potential changes. All these properties were linearly dependent on each other. Correlations to products of Gutmann's DN and AN numbers and other relevant properties such as polar, hydrogen bond and acid-base contributions to solubility parameters and surface tensions were found to be less successful particularly when very polar liquids were encountered. Commonly used DLVO models for repulsive interaction energy between particles in aqueous electrolyte suspensions have been simplified when dealing with low-polar, non-polar and apolar suspensions. When evaluating factors contributing to attractive and repulsive interaction energies, it is found that in order for the models to be relevant the extension of diffuse charging has to be much larger than the distance to repulsive barrier ensuring suspension stability. At this limit and at high surface potentials, the repulsive energy grows exceptionally large being in the range of lattice energy of each solid. The models fail when surface potential is low and the extension of diffuse charging is much smaller than the distance to repulsive barrier. Then interaction energies are reasonable. The investigated Au, SiO2, Glass, TiO2, Al2O3, CaCO3, MgO suspensions fall between these limits. The attractive energy is small but significant as compared to repulsive energy. All energies were larger than the estimated lower limit for stable suspensions.
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      PubDate: 2018-06-21T06:52:05Z
  • A comprehensive review on rheological studies of sludge from various
           sections of municipal wastewater treatment plants for enhancement of
           process performance
    • Abstract: Publication date: Available online 15 June 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Eugene Hong, Anteneh Mesfin Yeneneh, Tushar Kanti Sen, Ha Ming Ang, Ahmet Kayaalp
      Large quantities of sludge is generated from different sections of a wastewater treatment plant operation. Sludge can be a solid, semisolid or liquid muddy residual material. Understanding the flow behaviour and rheological properties of sewage sludge at different sections of a wastewater treatment plant (WWTP) is important for the design of pumping system, mixing, hydrodynamics and mass transfer rates of various sludge treatment units, optimization of conditioning dose and for sustainable sludge management. The current article provides a comprehensive review on up to date literature information on rheological behaviour of raw primary sludge, excess activated sludge, thickened excess activated sludge, mixture of raw primary and thickened excess activated sludge (mixed sludge), digested sludge, and biosolid under the influence of different operating parameters and their impacts on process performance. The influences of various process parameters such as solid concentration, temperature, pH, floc particle size, primary to secondary sludge mixing ratio, aging and conditioning agent doses on the rheological behaviour of sludge from different treatment units of WWTPs are critically analysed here. Yield stress was reported to increase with increasing solid concentration for all types of sludge whereas viscosity showed a decreasing trend with decreasing total solid concentration and percentage of thickened excess activated sludge in the mixture. Temperature showed an inverse relationship with yield stress and viscosity. Viscosity was reported to be decreased with decrease in pH. The effect of various conditioning agents on the rheological behaviour of sludge are also discussed here. The applicability and practical significance of various rheological models such as Bingham, Power Law (Ostwald), Herschel-Bulkley, Casson, Sisko, Careau, and Cross models to experimental rheological characteristics of various sludges were presented here. The reported results on various rheological parameters such as shear stress, yield stress, flow index, infinite, zero-rate viscosity, and flow consistency index of different sludge types obtained from the best fitted model were also compiled here. Conclusions have been drawn from the literature reviewed and few suggestions for future research direction are proposed.
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      PubDate: 2018-06-18T06:47:37Z
  • Wall slip for complex liquids – Phenomenon and its causes
    • Abstract: Publication date: Available online 15 June 2018
      Source:Advances in Colloid and Interface Science
      Author(s): A. Ya Malkin, S.A. Patlazhan
      In this review, we tried to qualify different types and mechanisms of wall slip phenomenon, paying particular attention to the most recent publications and issues. The review covers all type of fluids – homogeneous low molecular weight liquids, polymer solution, multi-component dispersed media, and polymer melts. We focused on two basic concepts - fluid-solid wall interaction and shear-induced fluid-to-solid transitions - which are the dominant mechanisms of wall slip. In the first part of the review, the theoretical and numerical studies of correlation of wetting properties and wall slip of low molecular weight liquids and polymeric fluids are reviewed along with some basic experimental results. The influence of nanobubbles and microcavities on the effectiveness of wall slip is illuminated with regard to the bubble dynamics, as well as their stability at smooth and rough interfaces, including superhydrophobic surfaces. Flow of multi-component matter (microgel pastes, concentrated suspensions of solid particles, compressed emulsions, and colloidal systems) is accompanied by wall slip in two cases. The first one is typical of viscoplastic media which can exist in two different physical states, as solid-like below the yield point and liquid-like at the applied stresses exceeding this threshold. Slip takes place at low stresses. The second case is related to the transition from fluid to solid states at high deformation rates or large deformations caused by the strain-induced glass transition of concentrated dispersions. In the latter case, the wall effects consist of apparent slip due to the formation of a low viscous thin layer of fluid at the wall. The liquid-to-solid transition is also a dominant mechanism in wall slip of polymer melts because liquid polymers are elastic fluids which can be in two relaxation states depending on the strain rate. The realization of these mechanisms is determined by polymer melt interaction with the solid wall.
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      PubDate: 2018-06-18T06:47:37Z
  • Polyphenols at interfaces
    • Authors: Reitzer Manon; Allais Vincent Ball Florent Meyer
      Abstract: Publication date: Available online 7 June 2018
      Source:Advances in Colloid and Interface Science
      Author(s): François Reitzer, Manon Allais, Vincent Ball, Florent Meyer
      Polyphenols are important molecules in living organisms, particularly in plants, where they serve as protectants against predators. They are also of fundamental importance in pharmacology for their antioxidant and antibacterial activities. Since a few years polyphenols are also used in surface functionalization mimicking the tannin deposition observed when tea or red wine are in contact with the surface of cups or glasses respectively. The interaction of polyphenols with proteins to yield colloids and of polyphenol with surfaces will be reviewed in this article to provide an overview of such particles and surface functionalization methods in modern surface science. Particular emphasis will be given to biological applications of polyphenols at interfaces.
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      PubDate: 2018-06-07T06:26:23Z
  • Halloysite clay nanotubes for life sciences applications: From drug
           encapsulation to bioscaffold
    • Authors: C. Santos Ana; Ferreira Caroline; Veiga Francisco; J. Ribeiro Antonio; Panchal Abhishek; Lvov Yuri; Agarwal Anshul
      Abstract: Publication date: Available online 31 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): C. Santos Ana, Ferreira Caroline, Veiga Francisco, J. Ribeiro Antonio, Panchal Abhishek, Lvov Yuri, Agarwal Anshul
      Natural forming clay halloysite is an emerging nanomaterial carrier for sustained drug delivery. These 50 nm diameter aluminosilicate tubes, with inner - alumina and outer - silica surface layers, can be loaded with 10–30 wt% of drug molecules, DNA and enzymes. The opposite charge of the inner and outer halloysite surface allow for selective drug adsorption inside or outside the clay nanotubes. The drug loaded halloysite enhanced the zeta potential of minus 50–60 mV allowing for stable aqueous nanocolloids. Halloysite nanoformulations provide an extended 10–20 h release profile, and may be functionalized (e.g., clogging tubes' end with polymers extending release time to 1–2 weeks or allowing for triggered release), which renders these clay nanostructures as promising controlled delivery systems. Recent studies demonstrate the potential of abundantly available halloysite clay nanotubes for life science applications, from drug delivery via oral or topical administration, to tissue scaffolds and regenerative medicine, while assessing their cellular internalization, stability, biosafety and biocompatibility are featured. The benefits and limitations of halloysite clay nanotubes are discussed, as well as the directions for future developments.
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      PubDate: 2018-06-01T06:11:47Z
      DOI: 10.1016/j.cis.2018.05.007
  • An overview of the transport of liquid molecules through structured
           polymer films, barriers and composites – Experiments correlated to
           structure-based simulations
    • Authors: Sofie Gårdebjer; Mikael Larsson; Tobias Gebäck; Marie Skepö; Anette Larsson
      Abstract: Publication date: Available online 25 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Sofie Gårdebjer, Mikael Larsson, Tobias Gebäck, Marie Skepö, Anette Larsson
      Films engineered to control the transport of liquids are widely used through society. Examples include barriers in packaging, wound care products, and controlled release coatings in pharmaceutics. When observed at the macroscopic scale such films commonly appear homogeneous, however, a closer look reveals a complex nano- and microstructure that together with the chemical properties of the different domains control the transport properties. In this review we compare and discuss macroscopic transport properties, measured using the straightforward, yet highly powerful technique “modified Ussing chambers”, also denoted side-by-side diffusion cells, for a wide range of structured polymer films and composites. We also discuss and compare the macroscopic observations and conclusions on materials properties with that of lattice Boltzmann simulations of transport properties based on underlying material structure and chemistry. The survey of the field: (i) highlights the use and power of modified Ussing Chambers for determining liquid transport properties of polymer films, (ii) demonstrates the predictability in both directions between macroscopic observations of transport using modified Ussing chambers and structure-based simulations, and (iii) provides experimental and theoretical insights regarding the transport-determining properties of structured polymer films and composites.
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.05.004
  • Growth of wormlike micelles in nonionic surfactant solutions: Quantitative
           theory vs. experiment
    • Authors: Krassimir D. Danov; Peter A. Kralchevsky; Simeon D. Stoyanov; Joanne L. Cook; Ian P. Stott; Eddie G. Pelan
      Abstract: Publication date: Available online 18 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Krassimir D. Danov, Peter A. Kralchevsky, Simeon D. Stoyanov, Joanne L. Cook, Ian P. Stott, Eddie G. Pelan
      Despite the considerable advances of molecular-thermodynamic theory of micelle growth, agreement between theory and experiment has been achieved only in isolated cases. A general theory that can provide self-consistent quantitative description of the growth of wormlike micelles in mixed surfactant solutions, including the experimentally observed high peaks in viscosity and aggregation number, is still missing. As a step toward the creation of such theory, here we consider the simplest system – nonionic wormlike surfactant micelles from polyoxyethylene alkyl ethers, C i E j . Our goal is to construct a molecular-thermodynamic model that is in agreement with the available experimental data. For this goal, we systematized data for the micelle mean mass aggregation number, from which the micelle growth parameter was determined at various temperatures. None of the available models can give a quantitative description of these data. We constructed a new model, which is based on theoretical expressions for the interfacial-tension, headgroup-steric and chain-conformation components of micelle free energy, along with appropriate expressions for the parameters of the model, including their temperature and curvature dependencies. Special attention was paid to the surfactant chain-conformation free energy, for which a new more general formula was derived. As a result, relatively simple theoretical expressions are obtained. All parameters that enter these expressions are known, which facilitates the theoretical modeling of micelle growth for various nonionic surfactants in excellent agreement with the experiment. The constructed model can serve as a basis that can be further upgraded to obtain quantitative description of micelle growth in more complicated systems, including binary and ternary mixtures of nonionic, ionic and zwitterionic surfactants, which determines the viscosity and stability of various formulations in personal-care and house-hold detergency.
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.05.006
  • Drop “impact” on an airfoil surface
    • Authors: Zhenlong
      Abstract: Publication date: Available online 17 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Zhenlong Wu
      Drop impact on an airfoil surface takes place in drop-laden two-phase flow conditions such as rain and icing, which are encountered by wind turbines or airplanes. This phenomenon is characterized by complex nonlinear interactions that manifest rich flow physics and pose unique modeling challenges. In this article, the state of the art of the research about drop impact on airfoil surface in the natural drop-laden two-phase flow environment is presented. The potential flow physics, hazards, characteristic parameters, droplet trajectory calculation, drop impact dynamics and effects are discussed. The most key points in establishing the governing equations for a drop-laden flow lie in the modeling of raindrop splash and water film. The various factors affecting the drop impact dynamics and the effects of drop impact on airfoil aerodynamic performance are summarized. Finally, the principle challenges and future research directions in the field as well as some promising measures to deal with the adverse effects of drop-laden flows on airfoil performance are proposed.
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      PubDate: 2018-05-29T06:09:27Z
  • A comprehensive review on self-healing of asphalt materials: Mechanism,
           model, characterization and enhancement
    • Authors: Daquan Sun; Guoqiang Sun; Xingyi Zhu; Alvaro Guarin; Bin Li; Ziwei Dai; Jianming Ling
      Abstract: Publication date: Available online 9 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Daquan Sun, Guoqiang Sun, Xingyi Zhu, Alvaro Guarin, Bin Li, Ziwei Dai, Jianming Ling
      Self-healing has great potential to extend the service life of asphalt pavement, and this capability has been regarded as an important strategy when designing a sustainable infrastructure. This review presents a comprehensive summary of the state-of-the-art investigations concerning the self-healing mechanism, model, characterization and enhancement, ranging from asphalt to asphalt pavement. Firstly, the self-healing phenomenon as a general concept in asphalt materials is analyzed including its definition and the differences among self-healing and some viscoelastic responses. Additionally, the development of self-healing in asphalt pavement design is introduced. Next, four kinds of possible self-healing mechanism and corresponding models are presented. It is pointed out that the continuum thermodynamic model, considering the whole process from damage initiation to healing recovery, can be a promising study field. Further, a set of self-healing multiscale characterization methods from microscale to macroscale as well as computational simulation scale, are summed up. Thereinto, the computational simulation shows great potential in simulating the self-healing behavior of asphalt materials from mechanical and molecular level. Moreover, the factors influencing self-healing capability are discussed, but the action mechanisms of some factors remain unclear and need to be investigated. Finally, two extrinsic self-healing technologies, induction heating and capsule healing, are recommended as preventive maintenance applications in asphalt pavement. In future, more effective energy-based healing systems or novel material-based healing systems are expected to be developed towards designing sustainable long-life asphalt pavement.
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.05.003
  • Tears of wine: The dance of the droplets
    • Authors: Alex Nikolov; Darsh Wasan; Jongju Lee
      Abstract: Publication date: Available online 5 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Alex Nikolov, Darsh Wasan, Jongju Lee
      For a long time, the phenomenon known as the “tears of wine” was believed to be due only to the surface tension gradient (e.g., the Thomson-Marangoni stress on the fluid/fluid surface's dynamics of wetting) and gravity. We experimentally demonstrated that the wine tear formation is not solely due to the surface tension gradient; instead, the ridge instability triggers the wine tears. Pouring wine into a glass causes a wine film to form on the glass. The film drains down under gravity and a ridge forms at its upper part. Over time, the ridge becomes unstable. Under gravity, a necklace of droplets (tears) appears and slides down. Here, we present experimental evidence that the Plateau-Rayleigh-Taylor theory for the stability criterion of a horizontal annulus fluid column under small, exponentially growing capillary disturbances and the surface tension breakdown into droplets can also be applied to the stability of a horizontal fluid's (wine) ridge on a wetted solid, where gravity causes the droplets (tears) to slide down, resulting in the formation of a necklace of droplets (“tears”). The wine droplets (“tears”) move down and up (“dance”) due to the effects of the surface tension gradient and gravity. The process repeats itself for a while. Over time, the wine components (e.g., organic acids and tannins) adhere on the glass. The glass surface becomes less hydrophilic and the wine wets the glass less. The wine film on the glass becomes unstable, the ridge does not form, and the tears stop appearing. The knowledge gained from the present study will enhance our understanding of the wetting and spreading dynamics of fluid mixtures on solids. It will also benefit our understanding of fundamental phenomena (such as wetting and spreading) and applied technologies (such as painting, printing, cooling, and cleaning), as well as aid in the development of robust devices (such as the lab on a chip).
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.05.001
  • Editorial
    • Authors: Author
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): No Author

      PubDate: 2018-05-29T06:09:27Z
  • Viscous dynamics of drops and bubbles in Hele-Shaw cells: Drainage, drag
           friction, coalescence, and bursting
    • Authors: Okumura
      Abstract: Publication date: May 2018
      Source:Advances in Colloid and Interface Science, Volume 255
      Author(s): Ko Okumura
      In this review article, we discuss recent studies on drops and bubbles in Hele-Shaw cells, focusing on how scaling laws exhibit crossovers from the three-dimensional counterparts and focusing on topics in which viscosity plays an important role. By virtue of progresses in analytical theory and high-speed imaging, dynamics of drops and bubbles have actively been studied with the aid of scaling arguments. However, compared with three-dimensional problems, studies on the corresponding problems in Hele-Shaw cells are still limited. This review demonstrates that the effect of confinement in the Hele-Shaw cell introduces new physics allowing different scaling regimes to appear. For this purpose, we discuss various examples that are potentially important for industrial applications handling drops and bubbles in confined spaces by showing agreement between experiments and scaling theories. As a result, this review provides a collection of problems in hydrodynamics that may be analytically solved or that may be worth studying numerically in the near future.
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      PubDate: 2018-05-29T06:09:27Z
  • A review of aqueous foam in microscale
    • Authors: Abdolhamid Anazadehsayed; Nastaran Rezaee; Jamal Naser; Anh V. Nguyen
      Abstract: Publication date: Available online 1 May 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Abdolhamid Anazadehsayed, Nastaran Rezaee, Jamal Naser, Anh V. Nguyen
      In recent years, significant progress has been achieved in the study of aqueous foams. Having said this, a better understanding of foam physics requires a deeper and profound study of foam elements. This paper reviews the studies in the microscale of aqueous foams. The elements of aqueous foams are interior Plateau borders, exterior Plateau borders, nodes, and films. Furthermore, these elements' contribution to the drainage of foam and hydraulic resistance are studied. The Marangoni phenomena that can happen in aqueous foams are listed as Marangoni recirculation in the transition region, Marangoni-driven flow from Plateau border towards the film in the foam fractionation process, and Marangoni flow caused by exposure of foam containing photosurfactants under UV. Then, the flow analysis of combined elements of foam such as PB-film along with Marangoni flow and PB-node are studied. Next, we contrast the behavior of foams in different conditions. These various conditions can be perturbation in the foam structure caused by injected water droplets or waves or using a non-Newtonian fluid to make the foam. Further review is about the effect of oil droplets and particles on the characteristics of foam such as drainage, stability and interfacial mobility.
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.04.004
  • Dopamine-assisted co-deposition: An emerging and promising strategy for
           surface modification
    • Authors: Wen-Ze Qiu; Hao-Cheng Yang; Zhi-Kang Xu
      Abstract: Publication date: Available online 27 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Wen-Ze Qiu, Hao-Cheng Yang, Zhi-Kang Xu
      Mussel-inspired chemistry based on polydopamine (PDA) deposition has been developed as a facile and universal method for the surface modification of various materials. However, the inherent shortcomings of PDA coatings still impede their practical applications in the development of functional materials. In this review, we introduce the recent progress in the emerging dopamine-assisted co-deposition as a one-step strategy for functionalizing PDA-based coatings, and improving them in the aspects of deposition rate, morphology uniformity, surface wettability and chemical stability. The co-deposition mechanisms are categorized and discussed according to the interactions of dopamine or PDA with the introduced co-component. We also emphasize the influence of these interactions on the properties of the resultant PDA-based coatings. Meanwhile, we conclude the representative potential applications of those dopamine-assisted co-deposited coatings in material science, especially including separation membranes and biomaterials. Finally, some important issues and perspectives for theoretical study and applications are briefly discussed.
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.04.011
  • Engineered nanomaterials growth control by monomers and micelles: From
           surfactants to surface active polymers
    • Authors: Mandeep Singh Bakshi
      Abstract: Publication date: Available online 27 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Mandeep Singh Bakshi
      In pseudo-micellar phase, the crystal growth is primarily achieved by the surface activity of the monomers in the presence of micelles. To ensure the maximum potential of surface activity of monomers in morphology control, a micellar phase is required. This account specifically focuses on the crystal growth control by the surface active monomers of conventional surfactants and that of water soluble polymers. It also distinguishes the mechanisms involved in the shape control driven by the micellar phase of micelle forming polymers, their role as nanoreactors, micellar stability, and micellar transitions from the monomeric phase. The fundamental basis of the crystal growth control by the surface active agents holds the key of using other non-convectional surface active species like proteins, carbohydrates, and bioactive polymers to achieve morphology control bionanomaterials for their specific biological applications.
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      PubDate: 2018-05-29T06:09:27Z
      DOI: 10.1016/j.cis.2018.04.012
  • The development of a novel smart material based on colloidal microgels and
    • Authors: Natasa Majcen; Reham Mohsen; Martin J. Snowden; John C. Mitchell; Bojana Voncina
      Abstract: Publication date: Available online 22 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Natasa Majcen, Reham Mohsen, Martin J. Snowden, John C. Mitchell, Bojana Voncina
      Colloidal microgels are often described as “smart” due to their ability to undergo quite dramatic conformational changes in response to a change in their environmental conditions (e.g. temperature, pH). A range of novel smart materials were developed by the incorporation of colloidal microgels into cotton fabric. A series of microgels have been prepared by a surfactant free emulsion polymerization based on N-isopropylacrylamide (NIPAM) monomer. Poly(NIPAM) is a thermosensitive polymer which undergoes a conformational transition close to the human skin temperature. Poly(NIPAM) was co-polymerized acrylic acid (AA), to prepare pH/temperature-sensitive microgels. Microgel particles were characterized by scanning electron microscopy (SEM), attenuated total reflectance fourier transform infrared (ATR-FTIR) spectroscopy, and dynamic light scattering (DLS). This research aims at coupling microgel particles onto cotton fibers and comparing between different attachment techniques. The coupling reactions between microgels and cotton cellulose are only feasible if they both have appropriate functionalities. For microgels, this was achieved by using different initiators which introduce different functional groups on the particle surface and different surface charges. Cotton samples were successfully modified by carboxymethylation, periodate oxidation, grafting of 1,2,3,4-butanetetracarboxylic acid, and chloroacetylation in order to target possible reactions with the terminal functional groups of the microgel particles. Microgels were attached to the cotton fabrics using different methods and the bonds formed were determined by ATR-FTIR spectroscopy and SEM. The reaction yields were quantified gravimetrically and the maximum weight increase of cotton samples due to the attached microgels was around 24% (w/w).
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      PubDate: 2018-04-25T02:35:12Z
      DOI: 10.1016/j.cis.2018.04.005
  • Microrheology, advances in methods and insights
    • Authors: Qiuyang Xia; Huining Xiao; Yuanfeng Pan; Lidong Wang
      Abstract: Publication date: Available online 21 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Qiuyang Xia, Huining Xiao, Yuanfeng Pan, Lidong Wang
      Microrheology is an emerging technique that probes mechanical response of soft material at micro-scale. Generally, microrheology technique can be divided into active and passive versions. For active microrheology, a user-controlled force, e.g. magnetic force, electrostatic force, optical tweezers etc., is applied to embedded particle in medium of interest, and the particle motion under this force is tracked. For passive microrheology, the embedded particles only move due to thermal fluctuations in the medium, i.e. Brownian motion, and their trajectories are tracked and analyzed. After Mason's seminal paper that developed reliable theory to calculate the relation between viscoelastic property and Brownian motion of embedding particles, corresponding methods and equipments to track particle Brownian motion both in laboratory and commercially available, together with software for data analysis. During last two decades, extensive efforts have been paid to improve both the experiment techniques and data analysis methods, especially about how to link consequential particle positions into trajectories. Also, some insights have been revealed in soft matter system using this technique. In this review paper we attempt to go through the advances in experiment techniques and data analysis methods developed in last ten years along with some recent results obtained from these methods.
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      PubDate: 2018-04-25T02:35:12Z
      DOI: 10.1016/j.cis.2018.04.008
  • Current status and future developments in preparation and application of
           nonspherical polymer particles
    • Authors: Bing Yu; Hailin Cong; Qiaohong Peng; Chuantao Gu; Qi Tang; Xiaodan Xu; Chao Tian; Feng Zhai
      Abstract: Publication date: Available online 20 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Bing Yu, Hailin Cong, Qiaohong Peng, Chuantao Gu, Qi Tang, Xiaodan Xu, Chao Tian, Feng Zhai
      Nonspherical polymer particles (NPPs) are nano/micro-particulates of macromolecules that are anisotropic in shape, and can be designed anisotropic in chemistry. Due to shape and surface anisotropies, NPPs bear many unique structures and fascinating properties which are distinctly different from those of spherical polymer particles (SPPs). In recent years, the research on NPPs has surprisingly blossomed in recent years, and many practical materials based on NPPs with potential applications in photonic device, material science and biomedical engineering have been generated. In this review, we give a systematic, balanced and comprehensive summary of the main aspects of NPPs related to their preparation and application, and propose perspectives for the future developments of NPPs.
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      PubDate: 2018-04-25T02:35:12Z
      DOI: 10.1016/j.cis.2018.04.010
  • Zeta potentials of the rare earth element fluorcarbonate minerals focusing
           on bastnäsite and parisite
    • Authors: C.L. Owens; G.R. Nash; K. Hadler; R.S. Fitzpatrick; C.G. Anderson; F. Wall
      Abstract: Publication date: Available online 20 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): C.L. Owens, G.R. Nash, K. Hadler, R.S. Fitzpatrick, C.G. Anderson, F. Wall
      Rare earth elements (REE) are critical to a wide range of technologies ranging from mobile phones to wind turbines. Processing and extraction of REE minerals from ore bodies is, however, both challenging and relatively poorly understood, as the majority of deposits contain only limited enrichment of REEs. An improved understanding of the surface properties of the minerals is important in informing and optimising their processing, in particular for separation by froth flotation. The measurement of zeta potential can be used to extract information regarding the electrical double layer, and hence surface properties of these minerals. There are over 34 REE fluorcarbonate minerals currently identified, however bastnäsite, synchysite and parisite are of most economic importance. Bastnäsite–(Ce), the most common REE fluorcarbonate, supplies over 50% of the world's REE. Previous studies of bastnäsite have showed a wide range of surface behaviour, with the iso-electric point (IEP), being measured between pH values of 4.6 and 9.3. In contrast, no values of IEP have been reported for parisite or synchysite. In this work, we review previous studies of the zeta potentials of bastnäsite to investigate the effects of different methodologies and sample preparation. In addition, measurements of zeta potentials of parisite under water, collector and supernatant conditions were conducted, the first to be reported. These results showed an iso-electric point for parisite of 5.6 under water, with a shift to a more negative zeta potential with both collector (hydroxamic and fatty acids) and supernatant conditions. The IEP with collectors and supernatant was <3.5. As zeta potential measurements in the presence of reagents and supernatants are the most rigorous way of determining the efficiency of a flotation reagent, the agreement between parisite zeta potentials obtained here and previous work on bastnäsite suggests that parisite may be processed using similar reagent schemes to bastnäsite. This is important for future processing of REE deposits, comprising of more complex REE mineralogy.
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      PubDate: 2018-04-25T02:35:12Z
      DOI: 10.1016/j.cis.2018.04.009
  • Ball milling of eggshell waste as a green and sustainable approach: A
    • Authors: Matej
      Abstract: Publication date: Available online 17 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Matej Baláž
      Eggshell waste belongs to the most abundant natural waste in nature and is created in huge amounts by everyday consumption of eggs. The majority of this material is being discarded, despite the fact that it has multidisciplinary applications. In this review, the possibility of utilization the method of ball milling to further broaden the application potential of this material is discussed. The particular application fields include the formation of nanophases, bioceramics synthesis, formation of composites and preparation of material with increased sorption ability. In addition, some other specific applications, like the utilization of ball-milled eggshell as a drug delivery agent, or for the formation of antibacterially active species, are also mentioned. The review provides a critical mechanochemical insight into this topic and aims to emphasize the green and sustainable way of utilizing eggshell waste by environmentally friendly method.
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      PubDate: 2018-04-25T02:35:12Z
  • The chemical (not mechanical) paradigm of thermodynamics of colloid and
           interface science
    • Authors: George Kaptay
      Abstract: Publication date: Available online 17 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): George Kaptay
      In the most influential monograph on colloid and interfacial science by Adamson three fundamental equations of “physical chemistry of surfaces” are identified: the Laplace equation, the Kelvin equation and the Gibbs adsorption equation, with a mechanical definition of surface tension by Young as a starting point. Three of them (Young, Laplace and Kelvin) are called here the “mechanical paradigm”. In contrary it is shown here that there is only one fundamental equation of the thermodynamics of colloid and interface science and all the above (and other) equations of this field follow as its derivatives. This equation is due to chemical thermodynamics of Gibbs, called here the “chemical paradigm”, leading to the definition of surface tension and to 5 rows of equations (see Graphical abstract). The first row is the general equation for interfacial forces, leading to the Young equation, to the Bakker equation and to the Laplace equation, etc. Although the principally wrong extension of the Laplace equation formally leads to the Kelvin equation, using the chemical paradigm it becomes clear that the Kelvin equation is generally incorrect, although it provides right results in special cases. The second row of equations provides equilibrium shapes and positions of phases, including sessile drops of Young, crystals of Wulff, liquids in capillaries, etc. The third row of equations leads to the size-dependent equations of molar Gibbs energies of nano-phases and chemical potentials of their components; from here the corrected versions of the Kelvin equation and its derivatives (the Gibbs-Thomson equation and the Freundlich-Ostwald equation) are derived, including equations for more complex problems. The fourth row of equations is the nucleation theory of Gibbs, also contradicting the Kelvin equation. The fifth row of equations is the adsorption equation of Gibbs, and also the definition of the partial surface tension, leading to the Butler equation and to its derivatives, including the Langmuir equation and the Szyszkowski equation. Positioning the single fundamental equation of Gibbs into the thermodynamic origin of colloid and interface science leads to a coherent set of correct equations of this field. The same provides the chemical (not mechanical) foundation of the chemical (not mechanical) discipline of colloid and interface science.
      Graphical abstract image

      PubDate: 2018-04-25T02:35:12Z
      DOI: 10.1016/j.cis.2018.04.007
  • Interactions between surfactants and the skin – Theory and practice
    • Authors: Artur Seweryn
      Abstract: Publication date: Available online 13 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Artur Seweryn
      One of the primary causes of skin irritation is the use of body wash cosmetics and household chemicals, since they are in direct contact with the skin, and they are widely available and frequently used. The main ingredients of products of this type are surfactants, which may have diverse effects on the skin. The skin irritation potential of surfactants is determined by their chemical and physical properties resulting from their structure, and specific interactions with the skin. Surfactants are capable of interacting both with proteins and lipids in the stratum corneum. By penetrating through this layer, surfactants are also able to affect living cells in deeper regions of the skin. Further skin penetration may result in damage to cell membranes and structural components of keratinocytes, releasing proinflammatory mediators. By causing irreversible changes in cell structure, surfactants can often lead to their death. The paper presents a critical review of literature on the effects of surfactants on the skin. Aspects discussed in the paper include the skin irritation potential of surfactants, mechanisms underlying interactions between compounds of this type and the skin which have been proposed over the years, and verified methods of reducing the skin irritation potential of surfactant compounds. Basic research conducted in this field over many years translate into practical applications of surfactants in the cosmetic and household chemical industries. This aspect is also emphasized in the present study.
      Graphical abstract image

      PubDate: 2018-04-16T10:07:15Z
      DOI: 10.1016/j.cis.2018.04.002
  • Adsorption of organic molecules on mineral surfaces studied by
           first-principle calculations: A review
    • Authors: Hongxia Zhao; Yong Yang; Xin Shu; Yanwei Wang; Qianping Ran
      Abstract: Publication date: Available online 9 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Hongxia Zhao, Yong Yang, Xin Shu, Yanwei Wang, Qianping Ran
      First-principle calculations, especially by the density functional theory (DFT) methods, are becoming a power technique to study molecular structure and properties of organic/inorganic interfaces. This review introduces some recent examples on the study of adsorption models of organic molecules or oligomers on mineral surfaces and interfacial properties obtained from first-principles calculations. The aim of this contribution is to inspire scientists to benefit from first-principle calculations and to apply the similar strategies when studying and tailoring interfacial properties at the atomistic scale, especially for those interested in the design and development of new molecules and new products.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.04.003
  • Liquid foam templating – A route to tailor-made polymer foams
    • Authors: Sébastien Andrieux; Aggeliki Quell; Cosima Stubenrauch; Wiebke Drenckhan
      Abstract: Publication date: Available online 3 April 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Sébastien Andrieux, Aggeliki Quell, Cosima Stubenrauch, Wiebke Drenckhan
      Solid foams with pore sizes between a few micrometres and a few millimetres are heavily exploited in a wide range of established and emerging applications. While the optimisation of foam applications requires a fine control over their structural properties (pore size distribution, pore opening, foam density, …), the great complexity of most foaming processes still defies a sound scientific understanding and therefore explicit control and prediction of these parameters. We therefore need to improve our understanding of existing processes and also develop new fabrication routes which we understand and which we can exploit to tailor-make new porous materials. One of these new routes is liquid templating in general and liquid foam templating in particular, to which this review article is dedicated. While all solid foams are generated from an initially liquid(-like) state, the particular notion of liquid foam templating implies the specific condition that the liquid foam has time to find its “equilibrium structure” before it is solidified. In other words, the characteristic time scales of the liquid and the solid foams are well separated, allowing to build on the vast know-how on liquid foams established over the last 20 years. The dispersed phase of the liquid foam determines the final pore size and pore size distribution, while the continuous phase contains the precursors of the desired porous scaffold. We review here the three key challenges which need to be addressed by this approach: (1) the control the structure of the liquid template, (2) the matching of the time scales between the stability of the liquid template and solidification, and (3) the preservation of the structure of the template throughout the process. Focusing on the field of polymer foams, this review gives an overview of recent research on the properties of liquid foam templates and summarises a key set of studies in the emerging field of liquid foam templating. It finishes with an outlook on future developments. Occasional references to non-polymeric foams are given if the analogy provides specific insight into a physical phenomenon.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.010
  • Hydrophobic and superhydrophobic surfaces fabricated using atmospheric
           pressure cold plasma technology: A review
    • Authors: Panagiotis Dimitrakellis; Evangelos Gogolides
      Abstract: Publication date: Available online 29 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Panagiotis Dimitrakellis, Evangelos Gogolides
      Hydrophobic surfaces are often used to reduce wetting of surfaces by water. In particular, superhydrophobic surfaces are highly desired for several applications due to their exceptional properties such as self-cleaning, anti-icing, anti-friction and others. Such surfaces can be prepared via numerous methods including plasma technology, a dry technique with low environmental impact. Atmospheric pressure plasma (APP) has recently attracted significant attention as lower-cost alternative to low-pressure plasmas, and as a candidate for continuous rather than batch processing. Although there are many reviews on water-repellent surfaces, and a few reviews on APP technology, there are hardly any review works on APP processing for hydrophobic and superhydrohobic surface fabrication, a topic of high importance in nanotechnology and interface science. Herein, we critically review the advances on hydrophobic and superhydrophobic surface fabrication using APP technology, trying also to give some perspectives in the field. After a short introduction to superhydrophobicity of nanostructured surfaces and to APPs we focus this review on three different aspects: (1) The atmospheric plasma reactor technology used for fabrication of (super)hydrophobic surfaces. (2) The APP process for hydrophobic surface preparation. The hydrophobic surface preparation processes are categorized methodologically as: a) activation, b) grafting, c) polymerization, d) roughening and hydrophobization. Each category includes subcategories related to different precursors used. (3) One of the most important sections of this review concerns superhydrophobic surfaces fabricated using APP. These are methodologically characterized as follows: a) single step processes where micro-nano textured topography and low surface energy coating are created at the same time, or b) multiple step processes, where these steps occur sequentially in or out of the plasma. We end the review with some perspectives in the field. We aspire to address scientists, who will get involved in the fields of (super)hydrophobicity and/or in atmospheric pressure plasma processing.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.009
  • A review on wetting and water condensation - Perspectives for
           CO2 condensation
    • Authors: Ingrid Snustad; Ingeborg T Røe; Amy Brunsvold; Åsmund Ervik; Jianying He; Zhiliang Zhang
      Abstract: Publication date: Available online 29 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Ingrid Snustad, Ingeborg T Røe, Amy Brunsvold, Åsmund Ervik, Jianying He, Zhiliang Zhang
      Liquefaction of vapor is a necessary, but energy intensive step in several important process industries. This review identifies possible materials and surface structures for promoting dropwise condensation, known to increase efficiency of condensation heat transfer. Research on superhydrophobic and superomniphobic surfaces promoting dropwise condensation constitutes the basis of the review. In extension of this, knowledge is extrapolated to condensation of CO2. Global emissions of CO2 need to be minimized in order to reduce global warming, and liquefaction of CO2 is a necessary step in some carbon capture, transport and storage (CCS) technologies. The review is divided into three main parts: 1) An overview of recent research on superhydrophobicity and promotion of dropwise condensation of water, 2) An overview of recent research on superomniphobicity and dropwise condensation of low surface tension substances, and 3) Suggested materials and surface structures for dropwise CO2 condensation based on the two first parts.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.008
  • Bromelain-loaded nanoparticles: A comprehensive review of the state of the
    • Authors: Janaína Artem Ataide; Eloah Favero Gérios; Priscila Gava Mazzola; Eliana B. Souto
      Abstract: Publication date: Available online 27 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Janaína Artem Ataide, Eloah Favero Gérios, Priscila Gava Mazzola, Eliana B. Souto
      Stem bromelain is a common available cysteine protease derived from pineapple (Ananas comosus L.). Bromelain finds widespread applications in several areas, such as medicine, health, food, and cosmetics, and its strong proteolytic activity supports its future application in many additional fields. However, most proteins and/or enzymes are fragile, leading to important considerations about increase storage and operational stability to enable their practical application. In this scenario, the use of nanoparticles to deliver proteins is increasing exponentially, given that these systems are capable of enhance active's stability, solubility and permeability, and decrease toxicity. In the pharmaceutical nanotechnology field, bromelain has played different roles and thus this paper aims to review the available literature for the use of nanoparticles and bromelain.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.006
  • A review of the surface features and properties, surfactant adsorption and
           floatability of four key minerals of diasporic bauxite resources
    • Authors: Ningning Zhang; Anh V. Nguyen; Changchun Zhou
      Abstract: Publication date: Available online 27 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Ningning Zhang, Anh V. Nguyen, Changchun Zhou
      Diasporic bauxite represents one of the major aluminum resources. Its upgrading for further processing involves a separation of diaspore (the valuable mineral) from aluminosilicates (the gangue minerals) such as kaolinite, illite, and pyrophyllite. Flotation is one of the most effective ways to realize the upgrading. Since flotation is a physicochemical process based on the difference in the surface hydrophobicity of different components, determining the adsorption characteristics of various flotation surfactants on the mineral surfaces is critical. The surfactant adsorption properties of the minerals, in turn, are controlled by the surface chemistry of the minerals, while the latter is related to the mineral crystal structures. In this paper, we first discuss the crystal structures of the four key minerals of diaspore, kaolinite, illite, and pyrophyllite as well as the broken bonds on their exposed surfaces after grinding. Next, we summarize the surface chemistry properties such as surface wettability and surface electrical properties of the four minerals, and the differences in these properties are explained from the perspective of mineral crystal structures. Then we review the adsorption mechanism and adsorption characteristics of surfactants such as collectors (cationic, anionic, and mixed surfactants), depressants (inorganic and organic), dispersants, and flocculants on these mineral surfaces. The separation of diaspore and aluminosilicates by direct flotation and reverse flotation are reviewed, and the collecting properties of different types of collectors are compared. Furthermore, the abnormal behavior of the cationic flotation of kaolinite is also explained in this section. This review provides a strong theoretical support for the optimization of the upgrading of diaspore bauxite ore by flotation and the early industrialization of the reverse flotation process.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.005
  • Mechanisms of pattern formation from dried sessile drops
    • Authors: Maryam Parsa; Souad Harmand; Khellil Sefiane
      Abstract: Publication date: Available online 24 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Maryam Parsa, Souad Harmand, Khellil Sefiane
      The formation of patterns after the evaporation of colloidal droplets deposited on a solid surface is an everyday natural phenomenon. During the past two decades, this topic has gained broader audience due to its numerous applications in biomedicine, nanotechnology, printing, coating, etc. This paper presents a detailed review of the experimental studies related to the formation of various deposition patterns from dried droplets of complex fluids (i.e., nanofluids, polymers). First, this review presents the fundamentals of sessile droplet evaporation including evaporation modes and internal flow fields. Then, the most observed dried patterns are presented and the mechanisms behind them are discussed. The review ends with the categorisation and exhaustive investigation of a wide range of factors affecting pattern formation.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.007
  • BiOX (X = Cl, Br, I) photocatalytic nanomaterials: Applications for
           fuels and environmental management
    • Authors: Yang Yang; Chen Zhang; Cui Lai; Guangming Zeng; Danlian Huang; Min Cheng; Jiajia Wang; Fei Chen; Chengyun Zhou; Weiping Xiong
      Abstract: Publication date: Available online 20 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Yang Yang, Chen Zhang, Cui Lai, Guangming Zeng, Danlian Huang, Min Cheng, Jiajia Wang, Fei Chen, Chengyun Zhou, Weiping Xiong
      Energy and environmental issues are the major concerns in our contemporary “risk society”. As a green technique, photocatalysis has been identified as a promising solution for above-mentioned problems. In recent decade, BiOX (X = Cl, Br, I) photocatalytic nanomaterials have sparked numerous interest as economical and efficient photocatalysts for energy conversion and environmental management. The distinctive physicochemical properties of BiOX nanomaterials, especially their energy band structures and levels as well as relaxed layered nanostructures, should be responsible for the visible-light-driven photocatalytic performance improvement, which could be utilized in dealing with the global energy and environmental challenges. In this review, recent advances for the enhancement of BiOX photocatalytic activity are detailedly summarized. Furthermore, the applications of BiOX photocatalysts in water splitting and refractory organic pollutants removal are highlighted to offer guidelines for better development in photocatalysis. Particularly, no relative reports in previous studies were documented in CO2 reduction as well as heavy metals and air pollutants removal, thus this review presented as a considerable research value. Challenges in the construction of high-performance BiOX-based photocatalytic systems are also discussed. With the exponential growth of studies on BiOX photocatalytic nanomaterials, this review provides unique and comprehensive perspectives to design BiOX-based photocatalytic systems with superior visible light photocatalytic activity. The knowledge of both the merits and demerits of BiOX photocatalysts are updated and provided as a reference.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.004
  • Analysis of an old controversy: The compensation temperature for
           micellization of surfactants
    • Authors: M. Pilar Vázquez-Tato; Francisco Meijide; Julio A. Seijas; Francisco Fraga; José Vázquez Tato
      Abstract: Publication date: Available online 17 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): M. Pilar Vázquez-Tato, Francisco Meijide, Julio A. Seijas, Francisco Fraga, José Vázquez Tato
      The actual significance of the so-called compensation temperature T c for micellization of surfactants is reviewed. It is demonstrated that it is possible to obtain as many T c values as the number of temperature intervals in which the dependencies of enthalpy and entropy changes with temperature are analyzed. The value of each T c will be the central value T o of each temperature interval. These two facts suggest that T c is simply such experimental T o . Thus any physical interpretation derived from T c is unfounded.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.003
  • Emulsions in porous media: From single droplet behavior to applications
           for oil recovery
    • Authors: Antonio Perazzo; Giovanna Tomaiuolo; Valentina Preziosi; Stefano Guido
      Abstract: Publication date: Available online 14 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Antonio Perazzo, Giovanna Tomaiuolo, Valentina Preziosi, Stefano Guido
      Emulsions are suspensions of droplets ubiquitous in oil recovery from underground reservoirs. Oil is typically trapped in geological porous media where emulsions are either formed in situ or injected to elicit oil mobilization and thus enhance the amount of oil recovered. Here, we briefly review basic concepts on geometrical and wetting features of porous media, including thin film stability and fluids penetration modes, which are more relevant for oil recovery and oil-contaminated aquifers. Then, we focus on the description of emulsion flow in porous media spanning from the behaviour of single droplets to the collective flow of a suspension of droplets, including the effect of bulk and interfacial rheology, hydrodynamic and physico-chemical interactions. Finally, we describe the particular case of emulsions used in underground porous media for enhanced oil recovery, thereby discussing some perspectives of future work. Although focused on oil recovery related topics, most of the insights we provide are useful towards remediation of oil-contaminated aquifers and for a basic understanding of emulsion flow in any kind of porous media, such as biological tissues.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.002
  • Phytochemical-assisted synthetic approaches for silver nanoparticles
           antimicrobial applications: A review
    • Authors: Janardhan Reddy Koduru; Suresh Kumar Kailasa; Jigna R. Bhamore; Ki-Hyun Kim; Tanushree Dutta; Kowsalya Vellingiri
      Abstract: Publication date: Available online 9 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Janardhan Reddy Koduru, Suresh Kumar Kailasa, Jigna R. Bhamore, Ki-Hyun Kim, Tanushree Dutta, Kowsalya Vellingiri
      Silver nanoparticles (Ag NPs) have recently emerged as promising materials in the biomedical sciences because of their antimicrobial activities towards a wide variety of microorganisms. Nanomaterial-based drug delivery systems with antimicrobial activity are critical as they may lead to novel treatments for cutaneous pathogens. In this review, we explore the recent progress on phytochemical-mediated synthesis of Ag NPs for antimicrobial treatment and associated infectious diseases. We discuss the biological activity of Ag NPs including mechanisms, antimicrobial activity, and antifungal/antiviral effects towards various microorganisms. The advent of Ag NP-based nanocarriers and nano-vehicles is also described for treatment of different diseases, along with the mechanisms of microbial inhibition. Overall, this review will provide a rational vision of the main achievements of Ag NPs as nanocarriers for inhibition of various microbial agents (bacteria, fungus, and virus).
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.03.001
  • Anisotropic surface chemistry properties and adsorption behavior of
           silicate mineral crystals
    • Authors: Longhua Xu; Jia Tian; Houqin Wu; Shuai Fang; Zhongyuan Lu; Caifeng Ma; Wei Sun; Yuehua Hu
      Abstract: Publication date: Available online 7 March 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Longhua Xu, Jia Tian, Houqin Wu, Shuai Fang, Zhongyuan Lu, Caifeng Ma, Wei Sun, Yuehua Hu
      Anisotropic surface properties of minerals play an important role in a variety of fields. With a focus on the two most intensively investigated silicate minerals (i.e., phyllosilicate minerals and pegmatite aluminosilicate minerals), this review highlights the research on their anisotropic surface properties based on their crystal structures. Four surface features comprise the anisotropic surface chemistry of minerals: broken bonds, energy, wettability, and charge. Analysis of surface broken bond and energy anisotropy helps to explain the cleavage and growth properties of mineral crystals, and understanding surface wettability and charge anisotropy is critical to the analysis of minerals' solution behavior, such as their flotation performance and rheological properties. In a specific reaction, the anisotropic surface properties of minerals are reflected in the adsorption strengths of reagents on different mineral surfaces. Combined with the knowledge of mineral crushing and grinding, a thorough understanding of the anisotropic surface chemistry properties and the anisotropic adsorption behavior of minerals will lead to the development of effective relational models comprising their crystal structure, surface chemistry properties, and targeted reagent adsorption. Overall, such a comprehensive approach is expected to firmly establish the connection between selective cleavage of mineral crystals for desired surfaces and designing novel reagents selectively adsorbed on the mineral surfaces. As tools to characterize the anisotropic surface chemistry properties of minerals, DLVO theory, atomic force microscopy (AFM), and molecular dynamics (MD) simulations are also reviewed.
      Graphical abstract image

      PubDate: 2018-04-11T08:15:13Z
      DOI: 10.1016/j.cis.2018.02.004
  • Quantum dot-decorated semiconductor micro- and nanoparticles: A review of
           their synthesis, characterization and application in photocatalysis
    • Authors: Beata Bajorowicz; Marek P. Kobylański; Anna Gołąbiewska; Joanna Nadolna; Adriana Zaleska-Medynska; Anna Malankowska
      Abstract: Publication date: Available online 20 February 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Beata Bajorowicz, Marek P. Kobylański, Anna Gołąbiewska, Joanna Nadolna, Adriana Zaleska-Medynska, Anna Malankowska
      Quantum dot (QD)-decorated semiconductor micro- and nanoparticles are a new class of functional nanomaterials that have attracted considerable interest for their unique structural, optical and electronic properties that result from the large surface-to-volume ratio and the quantum confinement effect. In addition, because of QDs' excellent light-harvesting capacity, unique photoinduced electron transfer, and up-conversion behaviour, semiconductor nanoparticles decorated with quantum dots have been used widely in photocatalytic applications for the degradation of organic pollutants in both the gas and aqueous phases. This review is a comprehensive overview of the recent progress in synthesis methods for quantum dots and quantum dot-decorated semiconductor composites with an emphasis on their composition, morphology and optical behaviour. Furthermore, various approaches used for the preparation of QD-based composites are discussed in detail with respect to visible and UV light-induced photoactivity. Finally, an outlook on future development is proposed with the goal of overcoming challenges and stimulating further research into this promising field.
      Graphical abstract image

      PubDate: 2018-02-25T16:57:11Z
      DOI: 10.1016/j.cis.2018.02.003
  • The application of atomic force microscopy in mineral flotation
    • Authors: Yaowen Xing; Mengdi Xu; Xiahui Gui; Yijun Cao; Bent Babel; Martin Rudolph; Stefan Weber; Michael Kappl; Hans-Jürgen Butt
      Abstract: Publication date: Available online 6 February 2018
      Source:Advances in Colloid and Interface Science
      Author(s): Yaowen Xing, Mengdi Xu, Xiahui Gui, Yijun Cao, Bent Babel, Martin Rudolph, Stefan Weber, Michael Kappl, Hans-Jürgen Butt
      During the past years, atomic force microscopy (AFM) has matured to an indispensable tool to characterize nanomaterials in colloid and interface science. For imaging, a sharp probe mounted near to the end of a cantilever scans over the sample surface providing a high resolution three-dimensional topographic image. In addition, the AFM tip can be used as a force sensor to detect local properties like adhesion, stiffness, charge etc. After the invention of the colloidal probe technique it has also become a major method to measure surface forces. In this review, we highlight the advances in the application of AFM in the field of mineral flotation, such as mineral morphology imaging, water at mineral surface, reagent adsorption, inter-particle force, and bubble-particle interaction. In the coming years, the complementary characterization of chemical composition such as using infrared spectroscopy and Raman spectroscopy for AFM topography imaging and the synchronous measurement of the force and distance involving deformable bubble as a force sensor will further assist the fundamental understanding of flotation mechanism.
      Graphical abstract image

      PubDate: 2018-02-25T16:57:11Z
      DOI: 10.1016/j.cis.2018.01.004
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