Polyion complex membrane for separation of organic mixtures using pervaporation processes

摘要

Polyelectrolyte complex membranes between chitosan as a cationic polyectrolyte and poly(acrylic acid) as an anionic species were prepared by blending two polymer solutions in differnet ratio. Characterization of chitosan-poly(acrylic acid) complex membrane was investigated by Fourier transform-infrared (FT-IR), wide angle X-ray diffractometer, dielectric analyser. Pervaporation performances were investigated with various organic mixtures; water-ethanol, water-isopropanol, methanol-methyl-t-butyl ether mixtures. An increase of poly(acrylic acid) ocntent in the polyelectrolyte complex membranes affected the swelling behavior and pervaporation performance of water-ethanol mixture. Permeation flux decreased and the water concentration in the permeate was close to 100