Zwitterionic polyethersulfone ultrafiltration membrane with superior antifouling property

• DOI: 10.1016/j.memsci.2008.03.047
• Publication Date: 2008-04-02T13:31:56Z
• Authors: Q SHI; Y SU; W ZHAO; C LI; Y HU; Z JIANG; S ZHU
• Keywords: Ultrafiltration (renal); Phase inversion; Biofouling; Cationic polymerization; Polysulfone

A novel kind of zwitterionic polymer, tertiary amine-modified PES (TA-PES), bearing cationic tertiary amine groups and anionic sulfonic groups, was synthesized in this study. The as-synthesized TA-PES was employed to fabricate ultrafiltration membranes by phase inversion in a wet process using pure water or sodium chloride aqueous solution as coagulation bath. It was found that the as-fabricated ultrafiltration membranes exhibited distinct ion-strength-dependent flux due to the inherent zwitterionic characteristics of TA-PES. The permeation flux of TA-PES membranes can be varied dramatically by simply changing the ionic content in coagulation bath. Furthermore, TA-PES membranes displayed superior anti-protein-fouling property and desirable ultrafiltration performance.