The blend ultrafiltration membrane of the polysulfone and sulfonated polysulfone has been obtained.This membrane has moderate water flux, more than 90% retention for PEG 3000.

• 本文以聚砜和磺化聚砜为原料,制备了低截留分子量的共混超滤膜,此种膜具有适中透水量,对分子量3000的PEG截留率在90%25以上。