Ion exchange membrane based on block copolymers. Part III: preparation fo cation exchange membrane

摘要

A new type of ion exchange membrane was investigated for the purpose of applying electrodialysis process. The cation exchange membrane was prepared by sulfonation of the home-made block copolymers of polysulfone (PSf) and polyphenylenesulfidesulfone (PPSS). The lowest measured membrane area resistance, equilbrated in 2 M (mol/dm~3) KCl aqueous solution, was 2.5 Ωcm~2. The cation exchange capacity reached up to 1.9 meq/(g-dry-resin), and the transport number of K~+ was in the 0.77-0.87 range.