Preparation and Characterization of Nanofiltration Membranes by Coating Polyethersulfone Hollow Fibers With Sulfonated Poly(Ether Ether Ketone)(SPEEK)

摘要

A new type of nanofiltration membrane is reported based on coating a sulphonated poly(ether ether ketone)(SPEEK)layer on top of a polyethersulphone support.The membranes were characterized by dextran mixtures,salt solutions as well as negatively charged dyes.The SPEEK coated nanofiltration membranes showed molecular weight cutoff for dextran in the range of ultrafiltration,however,rather high rejection for sodium sulphate;retention for salts in the order of RNa2SO4>RNaCl>RMgCl2;in addition,the membranes showed a 97-100% retention to the organic dyes.