Authors:Devi Eka Septiyani Arifin Pages: 236 - 342 Abstract: The aims of this research to make poly(vinylidene fluoride) (PVDF) and poly(dimetilsiloksan) (PDMS) composites separator with blending membrane method. Synthesized of PVDF/PDMS composites separator used various ratio were 10/0, 9/1, 8/2, and 7/3. The purpose of increasing concentration of PDMS/PVDF to improve the performance of the composites separator which includes a dimensions of porosity, a pore density, and a electrical conductivity. Based on crystallographic analysis using XRD, the increasing concentration number of PDMS to make compositess was influence decreasing of crystallinity until 29.26% in a ratio 7/3.The analysing of FTIR have sound the wavenumber of each phase can distinguish, which this material includes in the criteria of the composites. The result using XRD and FTIR to material PVDF/PDMS composites in all of the ratio constituens have shown the identification of the structure α-phase of PVDF. The increase of concentration number PDMS influenced decreasing of pore dimension and increasing of pore density with the small of pore dimension 1.71 µm and pore density 4.07x1011 count/m2 inthe ratio 7/3. In a ratio 7/3, the value of the electrical conductivity was 3.45x10-4S/cm and the resistance increased up to 80%. PubDate: 2018-05-21 Issue No:Vol. 3, No. 2 (2018)
Authors:WILDA - AMANANTI, wilda amananti Pages: 243 - 246 Abstract: TiO2, ZnO and TiO2: ZnO Thin film have been deposited on glass substrate by sol-gel method of Spray Coating Technique. TiO2: ZnO and ZnO can form well above the glass substrate. The precursor solution of TiO2 and TiO2: ZnO is deposited using sol-gel method of Spray Coating Technique. Zinc acetate dehydrate (Zn (COOCH3) 2 .2H2O was dissolved into an isopropanol ((CH3) 2CHOH) solvent and then added monoethanolamine (MEA: HOCH2CH2NH2) .The solution was stirred at 70oC until a clear and homogeneous solution was obtained.Titanium Tetraisopropoxide (TTIP) 0 , 73 ml was dissolved into 4.27 ml of isopropanol and 20 ml of ethanol, after which the solution was titrated with 5 ml of ethanol, 3.4 ml acetic acid and 0.26 ml H2O, then stirred on hot plate stirrer at room temperature ( Further, the ZnO, TiO2 and TiO2: ZnO precursor gels were sprayed on a glass substrate that was heated at a temperature of 450 ° C. The results of the TiO2 thin film bandgap energy measurement were 3.58 eV, ZnO thin films of 3.08 eV, and a thin layer of TiO2: ZnO of 3.06 eV Doped photodegradation dye Direct blue 10 ppm using UV-reactor The highest percentage of degradation is found in TiO2: ZnO thin film PubDate: 2017-12-31 Issue No:Vol. 3, No. 2 (2017)
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