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Published on: July 4, 2016
Preparation of Nanoporous Polymer Membranes Utilizing Water Pressure and Solvent Mixtures
Abstract:
For the nanopore generation in cellulose acetate (CA), specific solvents consisting of water and acetone was utilized with water-pressure. Co-solvent ratio was changed w/w 8/2 to w/w 9/1 (Acetone/H2O) in 10% cellulose acetate solution. When the water pressure was vertically applied to CA free standing film with co-solvent, the water flux was observed, meaning the pore generation in polymer. The water flux of these CA polymer films was investigated depending on pressures. The polymers obtained from the 9:1 acetone/H2O mixture showed an improved water flux at 8 bar, which was attributable to the relative decrease in the water content with respect to acetone. The chemical and physical properties of the membranes were studied using SEM, FT-IR, porosimetry, and TGA experiments.
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