COMPOSITE MEMBRANE BASED ON SULFONATED POLYSULFONE-NATURAL ZEOLITE-TITANIUM DIOXIDE
Abstract
Composite membrane based on sulfonated polysulfone-natural zeolite-titanium dioxide has been performed. The composite membrane is carried out by mixing the sulfonated polysulfone with natural zeolite, with the mass ratio of sulfonated polysulfone: zeolite; 1: 0.5, 1: 1, and 1: 2. In each variation has been added titanium dioxide with of 10% (w/v) to the polymer solution. The next step is the casting on the glass plate by pouring the mixture. Subsequent evaporation of the solvent slowly to form a membrane. From FT-IR analysis obtained the small bands observed at about 1223 cm -1 corresponding to the asymmetry stretching the external vibrational bands of SiO4 or AlO4. On the other hand, bands around 792 cm -1 and 600 cm -1 are due to the symmetrical stretching of SiO4 or AlO4 and the vibrations of the double rings respectively. The small bands observed at about 600 cm -1 represent a bending mode for Si-O-Si. The interaction between sulfonated polysulfone and TiO2 has shown from the widening band of O-H bond uptake. Ti-O bonds have shown in the absorption of wave numbers 539.58 -516.32 cm -1 . Optimum ion exchange analysis obtained 1.003 meq/g for PSf 0.5 zeolite 10% TiO2 membrane, the degree of swelling obtained the optimum on the membrane PSf 1.5 zeolite 10% TiO2 of 0.09%, and methanol permeability was obtained on the membrane PSf 1.0 zeolite 10% TiO2 of 6.9 x10 -9 S/cm. The result of optimum proton conductivity for zeolite addition of 1.5 gram at temperature 70 C equal to 1.185 x 10 -2 S/cm.