Subjects -> ENGINEERING (Total: 2688 journals)
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CHEMICAL ENGINEERING (229 journals)                  1 2 | Last

Showing 1 - 200 of 234 Journals sorted alphabetically
ACS Applied Nano Materials     Hybrid Journal   (Followers: 9)
ACS Applied Polymer Materials     Hybrid Journal   (Followers: 8)
ACS Engineering Au     Open Access   (Followers: 6)
ACS Environmental Au     Open Access   (Followers: 9)
ACS ES&T Engineering     Hybrid Journal   (Followers: 1)
ACS ES&T Water     Hybrid Journal  
ACS Sustainable Chemistry & Engineering     Hybrid Journal   (Followers: 10)
Acta Chemica Malaysia     Open Access  
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials     Hybrid Journal   (Followers: 6)
Acta Polymerica     Hybrid Journal   (Followers: 9)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 10)
Advanced Chemical Engineering Research     Open Access   (Followers: 52)
Advanced Membranes     Open Access   (Followers: 3)
Advanced Powder Technology     Hybrid Journal   (Followers: 15)
Advances in Applied Ceramics     Hybrid Journal   (Followers: 4)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24)
Advances in Chemical Engineering and Science     Open Access   (Followers: 109)
Advances in Polymer Technology     Open Access   (Followers: 14)
Aerosol Science and Engineering     Hybrid Journal  
Aerosol Science and Technology     Hybrid Journal   (Followers: 13)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 6)
All Life     Open Access  
American Journal of Polymer Science & Engineering     Open Access   (Followers: 2)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 12)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Anti-Corrosion Methods and Materials     Hybrid Journal   (Followers: 11)
Applied Petrochemical Research     Open Access   (Followers: 2)
ASEAN Journal of Chemical Engineering     Open Access  
Asia-Pacific Journal of Chemical Engineering     Hybrid Journal   (Followers: 6)
Asian Journal of Applied Chemistry Research     Open Access   (Followers: 1)
Biochemical Engineering Journal     Hybrid Journal   (Followers: 13)
Biofuel Research Journal     Open Access   (Followers: 1)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Bulletin of Chemical Reaction Engineering & Catalysis     Open Access   (Followers: 3)
Bulletin of Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
C&EN Global Enterprise     Full-text available via subscription  
Carbohydrate Polymers     Hybrid Journal   (Followers: 9)
Carbon Capture Science & Technology     Open Access  
Case Studies in Chemical and Environmental Engineering     Open Access  
Catalysts     Open Access   (Followers: 11)
Chem Catalysis     Hybrid Journal  
ChemBioEng Reviews     Full-text available via subscription   (Followers: 3)
ChemEngineering     Open Access  
Chemical and Engineering News     Free   (Followers: 22)
Chemical and Materials Engineering     Open Access   (Followers: 54)
Chemical and Petroleum Engineering     Hybrid Journal   (Followers: 8)
Chemical and Process Engineering     Open Access   (Followers: 67)
Chemical and Process Engineering Research     Open Access   (Followers: 64)
Chemical Engineer, The     Partially Free  
Chemical Engineering & Technology     Hybrid Journal   (Followers: 28)
Chemical Engineering and Processing: Process Intensification     Hybrid Journal   (Followers: 15)
Chemical Engineering and Science     Open Access   (Followers: 58)
Chemical Engineering Communications     Hybrid Journal   (Followers: 14)
Chemical Engineering Education     Full-text available via subscription   (Followers: 2)
Chemical Engineering Journal     Hybrid Journal   (Followers: 71)
Chemical Engineering Journal Advances     Open Access   (Followers: 1)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Engineering Research Bulletin     Open Access   (Followers: 44)
Chemical Engineering Science     Hybrid Journal   (Followers: 28)
Chemical Geology     Hybrid Journal   (Followers: 31)
Chemical Papers     Hybrid Journal   (Followers: 4)
Chemical Reviews     Hybrid Journal   (Followers: 168)
Chemical Science International Journal     Open Access  
Chemical Society Reviews     Hybrid Journal   (Followers: 44)
Chemical Technology     Open Access   (Followers: 75)
ChemInform     Hybrid Journal   (Followers: 5)
Chemistry & Industry     Full-text available via subscription   (Followers: 6)
Chemistry Africa : A Journal of the Tunisian Chemical Society     Hybrid Journal  
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry of Materials     Hybrid Journal   (Followers: 162)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 13)
Chempublish Journal     Open Access  
ChemSusChem     Hybrid Journal   (Followers: 7)
Chinese Chemical Letters     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemical Engineering     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Cleaner Chemical Engineering     Open Access   (Followers: 2)
Coke and Chemistry     Hybrid Journal   (Followers: 1)
Coloration Technology     Hybrid Journal  
Computational Biology and Chemistry     Hybrid Journal   (Followers: 13)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 12)
CORROSION     Full-text available via subscription   (Followers: 20)
Corrosion Engineering, Science and Technology     Hybrid Journal   (Followers: 35)
Crystal Research and Technology     Hybrid Journal   (Followers: 7)
Current Opinion in Chemical Engineering     Open Access   (Followers: 5)
Current Research in Food Science     Open Access  
Designed Monomers and Polymers     Open Access   (Followers: 1)
Digital Chemical Engineering     Open Access  
Discover Chemical Engineering     Open Access  
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
Eksergi     Open Access  
Emerging Trends in Chemical Engineering     Full-text available via subscription   (Followers: 3)
EnergyChem     Hybrid Journal   (Followers: 1)
Equilibrium : Journal of Chemical Engineering     Open Access  
Eurasian Chemico-Technological Journal     Open Access  
European Polymer Journal     Hybrid Journal   (Followers: 42)
Fibers and Polymers     Full-text available via subscription   (Followers: 4)
Focusing on Modern Food Industry     Open Access   (Followers: 2)
Food and Environment Safety     Open Access   (Followers: 3)
Food Chemistry     Hybrid Journal   (Followers: 18)
Food Chemistry : Molecular Sciences     Open Access   (Followers: 1)
Food Chemistry : X     Open Access   (Followers: 1)
Food Frontiers     Open Access   (Followers: 1)
Frontiers in Chemical Engineering     Open Access  
Frontiers in Sensors     Open Access   (Followers: 6)
Frontiers in Sustainable Food Systems     Open Access   (Followers: 2)
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 5)
Gases     Open Access   (Followers: 1)
Gels     Open Access  
Geochemistry International     Hybrid Journal   (Followers: 1)
Graphene Technology     Hybrid Journal  
Green Chemical Engineering     Open Access  
High Performance Polymers     Hybrid Journal   (Followers: 1)
Indian Chemical Engineer     Hybrid Journal   (Followers: 4)
Indian Journal of Chemical Technology (IJCT)     Open Access   (Followers: 9)
Indonesian Journal of Chemical Science     Open Access  
Industrial & Engineering Chemistry     Full-text available via subscription   (Followers: 10)
Industrial & Engineering Chemistry Research     Hybrid Journal   (Followers: 20)
Industrial Gases     Open Access  
Info Chimie Magazine     Full-text available via subscription   (Followers: 1)
International Journal of Ceramic Engineering & Science     Open Access  
International Journal of Chemical Engineering     Open Access   (Followers: 7)
International Journal of Chemical Technology     Open Access   (Followers: 7)
International Journal of Chemistry and Technology     Open Access   (Followers: 1)
International Journal of Chemoinformatics and Chemical Engineering     Full-text available via subscription   (Followers: 2)
International Journal of Food Science     Open Access   (Followers: 3)
International Journal of Industrial Chemistry     Open Access  
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
International Journal of Polymeric Materials     Hybrid Journal   (Followers: 6)
International Journal of Waste Resources     Open Access   (Followers: 5)
International Research Journal of Pure and Applied Chemistry     Open Access  
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)     Open Access   (Followers: 1)
Iranian Journal of Polymer Science and Technology     Open Access   (Followers: 1)
Journal of Advanced Manufacturing and Processing     Hybrid Journal  
Journal of Aerosol Science     Hybrid Journal   (Followers: 7)
Journal of Applied Crystallography     Hybrid Journal   (Followers: 7)
Journal of Applied Electrochemistry     Hybrid Journal   (Followers: 12)
Journal of Applied Polymer Science     Hybrid Journal   (Followers: 107)
Journal of Applied Science & Process Engineering     Open Access  
Journal of Biomaterials Science, Polymer Edition     Hybrid Journal   (Followers: 9)
Journal of Biopharmaceutics Sciences     Open Access   (Followers: 3)
Journal of Chemical & Engineering Data     Hybrid Journal   (Followers: 10)
Journal of Chemical and Petroleum Engineering     Open Access   (Followers: 1)
Journal of Chemical Ecology     Hybrid Journal   (Followers: 4)
Journal of Chemical Engineering     Open Access   (Followers: 63)
Journal of Chemical Engineering and Materials Science     Open Access   (Followers: 5)
Journal of Chemical Sciences     Partially Free   (Followers: 22)
Journal of Chemical Technology & Biotechnology     Hybrid Journal   (Followers: 11)
Journal of Chemical Theory and Computation     Hybrid Journal   (Followers: 21)
Journal of CO2 Utilization     Hybrid Journal   (Followers: 1)
Journal of Coating Science and Technology     Hybrid Journal  
Journal of Coatings     Open Access   (Followers: 3)
Journal of Engineered Fibers and Fabrics     Open Access  
Journal of Engineering & Processing Management     Open Access  
Journal of Environmental Chemical Engineering     Hybrid Journal   (Followers: 5)
Journal of Food Chemistry & Nanotechnology     Open Access   (Followers: 1)
Journal of Food Measurement and Characterization     Hybrid Journal  
Journal of Food Processing & Technology     Open Access   (Followers: 1)
Journal of Fuel Chemistry and Technology     Full-text available via subscription   (Followers: 1)
Journal of Geochemical Exploration     Hybrid Journal   (Followers: 4)
Journal of Industrial and Engineering Chemistry     Hybrid Journal   (Followers: 2)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Inorganic and Organometallic Polymers and Materials     Hybrid Journal   (Followers: 8)
Journal of Leather Science and Engineering     Open Access  
Journal of Materials Science and Chemical Engineering     Open Access   (Followers: 1)
Journal of Modern Chemistry & Chemical Technology     Open Access   (Followers: 2)
Journal of Non-Crystalline Solids     Hybrid Journal   (Followers: 7)
Journal of Non-Crystalline Solids : X     Open Access  
Journal of Organic Semiconductors     Open Access   (Followers: 6)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 3)
Journal of Polymer and Biopolymer Physics Chemistry     Open Access   (Followers: 7)
Journal of Polymer Research     Hybrid Journal   (Followers: 7)
Journal of Polymer Science Part C : Polymer Letters     Hybrid Journal   (Followers: 5)
Journal of Polymers     Open Access   (Followers: 7)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Journal of Powder Technology     Open Access   (Followers: 4)
Journal of Pure and Applied Chemistry Research     Open Access   (Followers: 3)
Journal of the American Chemical Society     Hybrid Journal   (Followers: 323)
Journal of The Institution of Engineers (India) : Series E     Hybrid Journal   (Followers: 2)
Journal of the Taiwan Institute of Chemical Engineers     Hybrid Journal   (Followers: 1)
Journal of the Turkish Chemical Society, Section B : Chemical Engineering     Open Access  
Journal of Water Chemistry and Technology     Hybrid Journal   (Followers: 8)
Journal on Today's Ideas - Tomorrow's Technologies     Open Access   (Followers: 1)
JSFA reports     Full-text available via subscription  
Jurnal Bahan Alam Terbarukan     Open Access  
Jurnal Inovasi Pendidikan Kimia     Open Access  
Jurnal Rekayasa Kimia & Lingkungan     Open Access  
Jurnal Teknologi Dan Industri Pangan     Open Access  
Korean Journal of Chemical Engineering     Hybrid Journal   (Followers: 5)
Kvasný Průmysl     Open Access  
Materials Advances     Open Access   (Followers: 2)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 15)
Materials Science for Energy Technologies     Open Access  
Materials Sciences and Applied Chemistry     Full-text available via subscription  
Modern Chemistry & Applications     Open Access   (Followers: 1)
Molecular Catalysis     Hybrid Journal   (Followers: 6)
Nanochemistry Research     Open Access   (Followers: 1)
Natural Volatiles & Essential Oils     Open Access  

        1 2 | Last

Similar Journals
Journal Cover
Fibers and Polymers
Journal Prestige (SJR): 0.471
Citation Impact (citeScore): 2
Number of Followers: 4  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 1229-9197 - ISSN (Online) 1875-0052
Published by The Korean Fiber Society Homepage  [1 journal]
  • Mechanical and Thermal Expansion Properties of Wood-PVC/LDPE Nanocomposite

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      Abstract: In the present research, mechanical properties, water absorption, and thermal stability of wood-poly(vinyl chloride)/low-density polyethylene (wood-PVC/LDPE) composite were improved via nanoclay addition. The presence of LDPE and Cloisite 30B at variable contents was studied. The composites were prepared by melt compounding and then compression molding. The morphology, mechanical, physical, and thermal properties of the composites were investigated. The micrographs of scanning electron microscopy (SEM) confirmed an appropriate coherence existing between lignocelluloses filler and PVC/LDPE matrix. The results revealed that the composite with 30 phr (parts per hundred) LDPE showed the best impact strength as 2887.33 kJ/m2. Besides, adding 3 phr nanoclay to the composite improved the impact strength by about 14 % and decreased the water absorption by 61 % compared to the PVC/wood composite. Also, the linear thermal expansion coefficient of the nanocomposite was 4.5×10−5 1/°C. The X-ray diffraction (XRD) pattern reflected that exfoliated structure was developed in the optimum compound. The obtained results recommended that the optimum properties could be attained using LDPE of 30 phr and 3 phr Cloisite 30B in the wood-PVC composite.
      PubDate: 2022-05-17
       
  • Thermo-mechanical Properties and Dead-load Creep Model Analysis of
           Recycled Polypropylene and Rubberwood Waste Composites for Construction
           Materials

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      Abstract: The thermal and mechanical properties of recycled polypropylene (rPP) and rubberwood flour (RWF) composites were investigated. The dead-load creep test was conducted to predict the lifetime of wood-plastic composites material. The composite pellets and specimens were produced by single-screw extruder and compression molding machine. The result showed that the thermogravimetric analysis displayed the decomposition of the composites occurred at two peaks, corresponding to the temperatures at which the RWF and rPP degraded. Additionally, the mechanical properties were measured to assess the wood-plastic composites performance. For creep test, the six-element Burger model was found to provide the best fit among others. The load levels 20, 30, and 40% of the ultimate flexural strength for the predicted lifetimes of composites exceed 10 years gave for 0.75, 1.30, and 1.75 strain. The experimental results support using the plastic as recycled and reinforcement application of naturally sourced in composite materials.
      PubDate: 2022-05-17
       
  • Performance Properties of PP/Sisal Fibre Composites having Near Critical
           Fibre Length and Prediction of Their Properties

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      Abstract: Critical fibre length (Lc) of natural fibre as reinforcement for polymeric composites is an essential parameter for enhancing mechanical properties. In this work, the effect of fibre treatment and addition of polypropylene grafted maleic anhydride (PP-g-MA) on Lc of sisal fibre, and interfacial shear strength (IFSS) of polypropylene (PP) matrix and sisal fibre (SF) were investigated. A single fibre pull-out test was used for the investigation, and the lowest critical fibre length was found to be 8 mm for PP/SF composites with compatibilizer (PP-g-MA). The final fibre length in the composites confirms the presence of near-critical length fibres. The composites prepared using near critical fibre length significantly improve the mechanical properties with increased fibre concentration. Flexural modulus of the composite with the highest amount (40 wt.%) of fibre was enhanced by 294 % compared to neat PP, which is a significance of near-critical fibre length. The prediction of composite properties was made by the inverse rule of mixture and Hirsch theory. It is found that PP/Sisal fibre composites offer properties that can be potentially used to produce high strength-to-weight ratio structural components.
      PubDate: 2022-05-17
       
  • Flexural Properties of Multi-Tow Structures Constructed from
           Glass/Polypropylene Tape under Various Manufacturing Conditions

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      Abstract: In this study, a multi-tow structure that can provide load-bearing functionality was fabricated through a proposed consolidation process proposed using polypropylene-impregnated continuous-glass-fiber composite tape (glass/PP tape). The flexural properties of the multi-tow structure were analyzed to evaluate the influence of the processing temperature, processing speed, number of glass/PP tapes, and glass fiber content of the glass/PP tapes. The proposed process for constructing the multi-tow structure can generate straight, curved, and looped three-dimensional structures by using a multi-joint robot and instantaneous consolidation of glass/PP tapes. As the number of glass/PP tapes increased, the resin-rich area increased and the void volume fraction in the multi-tow structure increased from 2 to 5 vol%, while the flexural strength decreased. However, when the number of glass/PP tapes and processing temperature were adjusted appropriately, the flexural strength of the multi-tow structure that can be constructed at speeds 30 times faster than those of conventional pultrusion process was relatively superior. The results of a finite element analysis, confirmed that the inclusion of the proposed multi-tow structure in a bumper beam was effective in reducing deformation and absorbing the impact energy due to external loads.
      PubDate: 2022-05-17
       
  • Energy-saving Cooling Coated Fabric with Robust Solar Reflection and Water
           Repellent Properties

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      Abstract: With the global climate changing, people are more aware of energy consumption and are interested in energy-saving products or materials. One way to reduce energy consumption to improve personal thermal management efficiency is urgently needed. Therefore, we provide an alternative energy-saving method that will improve fabrics’ thermal management by blocking infrared heat and ultraviolet light from solar radiation. A phase-inversion technique was developed to prepare poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) micro-size and nano-size composite pore structure which can block out the sun and be coated on fabric material. Meanwhile, by adding hydrophobic SiO2 aerogel particles (SA) to the system, the surface of coating became superhydrophobic, it improved waterproof and moisture-permeable properties of fabric which are important for wearing or using pleasantly. It can be used for any outdoor application such as tents, clothing, or some indoor use as well.
      PubDate: 2022-05-17
       
  • High-performance Electret and Antibacterial Polypropylene Meltblown
           Nonwoven Materials Doped with Boehmite and ZnO Nanoparticles for Air
           Filtration

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      Abstract: The current pandemic caused by COVID-19 has intensively triggered the development of high-performance air filters. Polypropylene (PP) is widely used as the raw material of meltblown nonwoven materials and is the core layer in air filters, such as masks. In this study, an electret PP meltblown nonwoven with antibacterial activity was developed, and nano boehmite (AlOOH) and nano-ZnO were employed as electret and antibacterial agents, respectively. AlOOH (0.5–2.0 wt%) and ZnO (1.0 wt%) were doped into the PP matrix using a twin-screw extruder, and the resulting masterbatches were applied as raw materials to produce nonwoven materials via a meltblown process. The as-prepared nonwoven samples were characterized by means of SEM, IR and DSC/TG. After corona charging, the filtration efficiency was determined by a filtration tester, charge decay was measured by an infrared electrostatic tester, and the antibacterial properties were evaluated (evaluation method: AATCC 100–2012). A dosage of AlOOH greater than 1.0 wt% endowed the nonwoven material with high filtration efficiency, and 1.0 wt% ZnO brought about antibacterial activity. Corona charging was an effective means to charge the nonwoven electret, and the charges were quicker to decay in air than in a sealed bag. The as-prepared meltblown nonwoven filter is a remarkably promising filter for air filtration.
      PubDate: 2022-05-17
       
  • Preparation of Layered Aramid Nanomembranes by Vacuum Assisted Filtration
           Using Water and Ethanol as Proton Donors

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      Abstract: In this paper, two kinds of proton donors, including water and ethanol, are introduced to prepare aramid nanofibers (ANFs) films. The formation mechanism of ANFs films and the influence of water and ethanol have been investigated. The main formation mechanism was demonstrated that ANFs could self-assemble into layered structure during the filtration process. The results showed that the ANFs films with water as proton donor had a tensile strength of 186.01 MPa and initial thermal decomposition temperature of 503.89 °C, which was 52.68% and 11.79% higher than those of the films prepared with ethanol as proton donor. Meanwhile, compared with spin coating and layer by layer self-assembly methods, vacuum assisted filtration was proved as an effective method to prepare the functional ANFs nanomembranes with highly regular and layered structures.
      PubDate: 2022-05-17
       
  • Effect of Gel-spun Solution Concentration on the Structure and Properties
           of UHMWPE Monofilaments with Coarse Denier

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      Abstract: Even though many efforts about the preparation of ultra-high molecular weight polyethylene (UHMWPE) fibers have been reported since last century, the spinning technology of high solution concentration UHMWPE fibers was still pursued by many researchers and industry members. Not only because solution concentration is a key factor that significantly influences the structure and properties of gel-spun UHMWPE fibers, but also because the high concentration UHMWPE spinning technology could greatly improve the production efficiency and reduce the spinning cost. In this study, high abrasion resistance UHMWPE fibers were prepared via gel-spinning with UHMWPE solution concentration of 8–16 wt%, subsequently extracting, drying and ultra-drawing. The effects of solution concentration on the fiber solvent phase separation, crystallization properties, abrasion resistance properties and mechanical capacities were investigated in detail. The results indicated that increasing solution concentration can reduce the time to reach phase separation equilibrium state that could efficiently shorten the productive time; meanwhile, the abrasion resistance of the fibers was also significantly improved.
      PubDate: 2022-05-17
       
  • Structure and Properties of Thermotropic Polyarylate/Polycarbonate Blends
           

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      Abstract: We herein report the morphology, rheological, thermal, and dynamic mechanical properties of thermotropic polyarylate/polycarbonate (PAR/PC, 70/30 by wt%) blends, which are compatibilized via melt-processing in the presence of different tetrabutylammonium tetraphenylborate catalyst loadings of 0.0–1.0 phr. The electron microscopic images exhibit that the compatibility of PAR/PC blends is improved with increasing the catalyst loading at the melt-compounding. The infrared spectroscopic analysis reveals the formation of PAR-co-PC copolymers in the melt-compounded blends via catalyst-assisted interchange reactions between ester groups of PAR and carbonate groups of PC. Accordingly, the shear moduli and complex viscosity at a melt state increase for the melt-processed blends with higher catalyst loadings. In addition, the melt-crystallization and melting temperatures of PAR and the glass transition temperature of PC tend to decrease for the blends manufactured at higher catalyst contents due to the shortening of crystallizable PAR and amorphous PC segments. Interestingly, the residue at 800 °C increases for the melt-processed blends with higher catalyst loadings. The elastic storage moduli of compatibilized PAR/PCT blends at a glassy sate are almost the same as that of neat PAR and far higher than that of neat PC. It is thus believed that PAR/PC blends can be efficiently compatibilized via catalyst-assisted ester-carbonate interchange reactions through a facile and scalable melt-compounding process and they can be used as engineering polymeric materials that alleviate the disadvantages of thermotropic PAR caused by its high anisotropic structure and physical properties.
      PubDate: 2022-05-17
       
  • Preparation and Properties of Functional Fabric Coating Based on
           SiO2-aerogel/Polyurethane

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      Abstract: The silane coupling agent modified SiO2 particles, multi aperture silica aerogel and waterborne polyurethane acrylate (WPUA) were blended to produce resin coated fabrics with good thermal stability, to achieve excellent water repellency and a certain protective property. The thermal stability and water repellency of ordinary cotton could be improved by the hydrophobic SiO2 particles, WPUA and silica aerogel (SA) powders on the fabric surface. Our experimental results illustrated that the thermal stability of the coated fabric was greatly improved by adding aerogels and silane modified SiO2, and the amount of residual carbon increased significantly at 600 °C as the corresponding residues of SA/WPUA coated fabric finally could be 13.19%. The water contact angle of the fabric was obviously increased after the silane modified SiO2 particles mixed with SA/WPUA. It was found that the more aerogel added, the larger the contact angle was, and the contact angel reached about 120° when the aerogel was 4 wt%. It could be proved that the coated fabric had a certain surface self-cleaning effect. The tensile tests characterized that the stress of the coated fabric reached the maximum value of 64 MPa when the aerogel dosage was 2 wt%. Chemical resistance analysis suggested that the fabric had similar chemical resistance after the integration of porous aerogel particles. However, unlike most polyurethane coatings, the majority of chemicals were adsorbed in aerogel coatings. The infrared spectrum of the coating samples showed that the coating surface was stable, which was attributed to the interfacial adhesion between cotton fiber and polyurethane adhesive. The appearance of aerogel and SiO2 particles dispersed on the fabric surface was analyzed by SEM. All outcomes indicated a significant improvement in general properties of WPUA coatings by adding a handful of silica aerogel (0.5–4 wt%).
      PubDate: 2022-05-17
       
  • A Robust Sericin Hydrogel Formed by a Native Sericin from Silkworm Bodies

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      Abstract: Sericin hydrogels with a serial of excellent properties are attractive in tissue engineering but still limited due to their poor mechanical strength. In this study we report a robust sericin hydrogel with high elastic modulus (310 kPa) that was formed by a native sericin solution with high concentration (16 %, w/v) collected from silkworm bodies. The hydrogel was performed via H2O2 and presented gelling kinetics within 30 s. This hydrogel possesses eximious elasticity, good cytocompatibility, and more stable in solution as well as porous structure. In addition, the hydrogel system is suitable for loading bioactive molecules owing to its wonderful sustained manner for delivering bioactive reagent. Together, our study indicates that the sericin hydrogel may serve as a new multifunctional platform for extending the application of sericin in tissue engineering and regenerative medicine.
      PubDate: 2022-05-17
       
  • Morphology and Compressive Property of 3D-printed 3-pointed Star Shape
           Prepared Using Lightweight Thermoplastic Polyurethane

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      Abstract: In this study, a 3-pointed star shape was manufactured using lightweight thermoplastic polyurethane under FDM 3D printing process conditions. Specifically, we modeled 3-pointed star-shaped auxetic structures with different thicknesses and samples obtained through a FDM 3D printing process using LW-TPU materials. Their morphologies, specific gravities, thermal properties, and compression characteristics were investigated under the nozzle temperatures of 200 °C, 220 °C, and 240 °C. The results of LW-TPU filaments analysis confirmed the presence of microspheres with foaming performance at extrusion temperatures above 200 °C. Regarding the compression characteristics of the 3-pointed star-shaped materials, it was found that higher printing temperatures were associated with lower compressive deformation rates and higher compressive strengths. This study shows that 3-pointed star-shaped structures having various compression characteristics can be 3D printed using LW-TPU material and specific nozzle temperatures.
      PubDate: 2022-05-17
       
  • Synthesis, Characterization, and Application of New Reactive Triazine Dye
           on Cotton and Paper

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      Abstract: Abstract A new orange homobifunctional triazine reactive dye was synthesized, using the dichlorotriazine reactive dye with the same chromophore. The homobifunctional and dichlorotriazine dyes were evaluated on textile and paper. The degree of exhaustion, fixation, and the fastness properties of dyed cotton samples of washing, acidic and alkaline perspiration, dry and wet rubbing were assessed. Dyes were used in the composition of offset printing paper with a fiber content of bleached softwood and hardwood pulp in a ratio of 1:1. The paper was sized with alkyl ketene dimer and natural calcium carbonate was used as a filler. The main strength and hydrophobic properties of the dyed papers were examined. The optical properties — L*, a*, b*, C*, and h* from the CIE Lab color space of the resulting paper and textile samples have been examined. As a result of the studies carried out it was found out that with both reactive dyes, paper and textile samples with similar color shades, uniform coloring, and stable color were obtained. With respect to the complex of the examined strength, capillary, and optical properties, better results were obtained with homobifunctional reactive triazine dye.
      PubDate: 2022-04-13
       
  • Experimental and Molecular Dynamics Studies on Tensile Properties of Nylon
           6/Graphene Composite Filaments

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      Abstract: Abstract The effect of graphene on mechanical properties and molecular structure of nylon 6 fibers was investigated by means of a simulation of molecular dynamics (MD) and an experimental design. Small quantities of graphene reaching 0.05 % by weight were mixed with nylon 6. Composite filaments were melt-spun and treated by drawing. The drawing experiments were designed using a Box-Behnken design, and the response surfaces of the tensile strength, initial modulus, and elongation at break of the drawn filaments were obtained. Mixing graphene increased tensile strength by 25 % to 7.2 g/d relative to the pristine nylon 6 filaments. The graphene strength and its orientation caused the increase in tensile strength, as revealed by the MD simulation. Drawing of the as-spun nylon 6/graphene composite filaments induced a crystal structure change from γ to α form and an increase in molecular orientation.
      PubDate: 2022-04-13
       
  • Fabrication and Characterization of Antibacterial Suture Yarns Containing
           PLA/Tetracycline Hydrochloride-PVA/Chitosan Nanofibers

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      Abstract: Abstract Antibacterial suture yarns containing antibiotic drugs can play an important role in preventing the infection and holding tissues together to achieve wound closure. In this research, the possibility of production drug loaded nano yarns from a mixture of chitosan/polyvinyl alcohol (PVA/CS) (70:30) and poly(lactic acid) (PLA) was assessed by combining dual-electrospinning technique with aligned fibers collection. For this, CS/PVA solution was injected from one syringe and PLA from another one. The effect of weight ratio of PLA-PVA/CS (100:0, 80:20 and 60:40), collector speed (500, 800, 1100 rpm) and voltage (10, 15 and 20 kV) on the diameter and morphology of fabricated nanofibers was assessed. Fabricated nanofibers with the length of 70 cm were twisted for manufacturing suture yarns. The results showed that fabrication of structure with the finest diameter was possible with the weight ratio of PLA-PVA/CS (60:40), the applied voltage of 15 kV, spinning distance of 17 cm and the rotational speed of about 1100 rpm. The diameter of produced nanofibers in this condition was about 290±42 nm. Then, tetracycline hydrochloride (T) loaded PLA-PVA/CS nanofibers (PLA/T-PVA/CS) were produced with optimum condition and the drug (5 wt. %) was loaded in PLA solution. FTIR analysis of drug loaded yarn exhibited the most important functional groups of chitosan, PVA, tetracycline hydrochloride and PLA in PLA-PVA/CS structure. Contact angle data for PLA-PVA/CS and PLA/T-PVA/CS was about 89±3 ° and 30±2 °, respectively. The result of the antibacterial test indicated that the PLA/T-PVA/CS nanofibrous yarns were the most suitable sample with the prominent antibacterial activity against both gram-positive bacterium Staphylococcus aureus and gram-negative bacterium Escherichia coli with inhibition zones of 17.5 and 20 mm, respectively. It seems that the fabricated nanofiber based yarns with suitable morphological characteristics, hydrophilicity nature, and prevention of the surgical infections without affecting the cell viability can be an excellent structure for utilization as suture yarn.
      PubDate: 2022-04-13
       
  • Eco-Friendly Dyeing of Wool Fabrics with Natural Dye Extracted from Citrus
           Sinensis L Peels

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      Abstract: Abstract Biomass has emerged as a sustainable and renewable resource for dyestuff production. There is an increasing interest like as in a natural chemical agent, especially in dyeing pigments. This study concerns the purification of natural dyestuff extracted from an abundant plant Citrus Sinensis L. Applications of this dye on wool fibers were investigated. Therefore, the mordanting methods and mordant agents were carried out. The dyeing behavior was assessed; the color changes were measured using Spectra Flash-Data Color, SF-600 in terms of CIE L*10 a*10 b*10 and the color strength (K/S). Hence, the color fastness properties were studied. Results obtained show that the optimum extraction conditions were the temperature of 90 °C, the extraction time of 90 min and the pH value equal to 5. The dyeing of wool fibers has been optimized and the optimal conditions are; the temperature of 90 °C, the dyeing time of 90 min, and pH value equal to 3. The study of mordant type and mordanting methods indicates that the concentration of 5 % (w/w) is sufficient, the iron sulfate is the most adequate mordant which provides the deeper color. The post-mordanting method produces slightly deeper color than the pre-mordanting and simultaneous processes. Then, direct dyeing offers encouraging results. Therefore, dyeing of wool fabric with this natural dye produces excellent color fastness properties. Finally, the Citrus sinensis L peels was very abundant and available substance which may be great potential to be used as a natural colorant.
      PubDate: 2022-04-13
       
  • Single-step Single Bath Dyeing and Finishing of Nylon with Disperse Dye
           and Chitosan by Using Decamethylcyclopentasiloxane Solvent as Dyeing Media
           

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      Abstract: Abstract This investigation was conducted to reduce the water and raw material consumption, and shorten the processing time by carrying out the dyeing and finishing process in a single-step and a single bath by using decamethylcyclopentasiloxane (D5) solvent as dyeing media. The nylon fabric was dyed with disperse dye and finished with chitosan in D5 solvent in a single-step. To improve the durability of the chitosan finish, the chitosan was ball milled into nanoparticles. Furthermore, nylon fabric was dyed with a high dye concentration, 3.2 %(o.w.f.), for assessing the feasibility of a single-step dyeing process for darker shades. Antibacterial activity, color strength, and SEM analysis of treated fabrics reveal that nylon fabric can be dyed and finished in a single step and single bath in D5 solvent. As compared to conventional aqueous dyeing, the single-step dyeing and finishing methodology yielded 53 % higher color strength. The 100 % reduction in bacteria colony forming units (CFU) was achieved with a 1 % concentration of milled chitosan. The fabric treated with milled chitosan sustained its antimicrobial activity even after 5 washes.
      PubDate: 2022-04-13
       
  • Application of Building Block Approach on Crashworthiness Design of
           Composite Vehicular Structures

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      Abstract: Abstract Firstly, the representative volume element (RVE) model was established at the microscale, a three-dimensional micromechanical material constitutive relationship was defined as the user defined material subroutine (UMAT) in ABAQUS/Standard, which was able to accurately capture mechanical behaviors of both matrix and fiber materials. Constrained by periodic boundary conditions (PBCs), the RVE model can be used to predict elastic properties as well as strength properties of the composite laminates. Then, the accuracy of the RVE model was validated by comparing the tensile responses between predictions and experiments. Next, comparisons in the flexural responses of carbon fiber reinforced plastic (CFRP) laminates, lateral and axial crushing behaviors of CFRP tubes between single-layer and multi-layer modeling approaches were investigated at the mesoscale, respectively. Numerical results indicated that the single-layer model was efficient to predict the mechanical indictors while the multi-layer method can reliably predict both mechanical indictors and deformation patterns. Finally, the validated finite element model (FEM) and material constitutive model were employed to investigate the material cost and crashworthiness characteristics of the composite bumper subsystem of the electric vehicle under the frontal crash condition at the macroscale.
      PubDate: 2022-04-13
       
  • Effect of Fabric Characteristics and Drum Rotation Speeds on the Movements
           and Drying Performances of Clothes in a Tumble Dryer

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      Abstract: Abstract The movements of clothes in a tumble dryer were analyzed according to fabric characteristics and drum rotation speeds, along with their effects on drying performances. Furthermore, regression models of the fabric characteristics in relation to their movements and drying performances were developed. When the drum rotation speed was increased from 35 to 50 rpm, dynamic movements were observed at the center of the drum, and the movement ranges continued to expand. However, at 65 rpm, the rotation of clothes occurred primarily along the drum wall. Based on these observations, clothing movements were categorized into four patterns. In addition, the clothing movements in the dryer were found to be completely different from those in the washer owing to the differences in their internal environment (i.e., the drum and water, respectively). Therefore, seven movement indices were newly introduced for the dryer. Drying rates, shrinkages and grades for the smoothness appearance of the clothes tended to decrease in the order of drum rotation speed (i.e., 50 > 35 > 65 rpm), with the exception of polyester shirts. Typically, the cotton samples exhibited lower drying rates and smoothness appearance grades with higher shrinkage rates than the polyester samples. Moreover, compared to dress shirts, T-shirts showed higher shrinkage rates and smoothness appearance grades. Although the standard moisture regain of the fabric significantly affected the drying rate, shrinkage was highly influenced by the elongation and standard deviation of the moving distance from the center of the sample between frames. The smoothness grade was significantly affected by the number of tumbles.
      PubDate: 2022-04-13
       
  • Optimization of Powder Impregnation Process Parameters of Carbon Fiber
           Reinforced Polyether-ether-ketone Prepreg Tape by Response Surface
           Methodology

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      Abstract: Abstract Carbon fiber reinforced polyether-ether-ketone (CF/PEEK) composite materials had a wide range of applications in the aerospace, electronics and electrical fields, etc. The composite materials were generally prepared from prepregs. Commonly used prepreg tape preparation methods had disadvantages of uneven resin distribution and inadequate fiber impregnation, resulting in high porosity and poor mechanical properties. In this research, a combined process of the double powder impregnation method and the melt homogenization method was used to prepare the CF/PEEK prepreg tape to solve the previous problems. Using this method, the porosity of the prepreg tape was reduced by 56.30 % and the tensile strength was increased by 43.35 % compared with the traditional powder impregnation method. At the same time, the prepreg tape was widened and thinned and the uniformity of resin distribution was improved. Besides, based on the single factor experiment, the response surface method was used to construct the impregnation model of the quadratic polynomial regression equation between the process parameters (powder impregnation temperature, traction speed and melt homogenization temperature) and the porosity of the CF/PEEK prepreg tape. According to this model, the process parameters for the porosity of the prepreg tape were calculated to reach the minimum, namely, the powder impregnation temperature was 380 °C, the traction speed was 1 m/min, and the melt homogenization temperature was 380 °C. As a result of these process parameters, the porosity of the prepreg tape could be reduced to 7.39 %. Subsequently, the model was verified through experiments, which could provide a reference for the process parameters setting of the impregnation process.
      PubDate: 2022-04-13
       
 
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