Nita Kusumawati, Toeti Koestiari, Supari Muslim
This article reports Polysulfone (PSf) membrane modification efforts by blending method using polymers Polyvinylidene fluoride (PVDF) superimposed on polyesther. This study aims to obtain asymmetry structure in cross section of PSf-PVDF blended membrane formed by applying a combination of the use of varied immersion temperature and frequency of non-solvent uses in the membrane preparation process. Polysulfone-Polyvinylidene fluoride blended membrane in this study was prepared by phase inversion method with immersion precipitation techniques. The casting solution of PSf-PVDF blended membrane made of PSf and PVDF polymer as main components, N-methyl pyrrolidinone (NMP) as a solvent and ammonium chloride (NH4Cl) as an additive. For inducing phase inversion on the casting solution, used H2O as non-solvent. Morphology of the PSf-PVDF blended membrane forms have been analyzed by Scanning Electron Microscopy (SEM) with a power of 20 kV; the results show the asymmetry structure on the cross-section morphology of all types of PSf-PVDF blended membrane which prepared. Formation of asymmetric structure in PSf-PVDF blended membrane is able to increase the permeability and selectivity of PSf-PVDF blended membranes against batik dyes, such as naphthol and indigosol types, which hypothetically caused by macrovoid creation on the membrane during the phase inversion process.
Departement of Chemistry, Universitas Negeri Surabaya, Surabaya, Indonesia; Departement of Electrical Engineering, Universitas Negeri Surabaya, Surabaya, Indonesia
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