A novel polyphenylquinoxaline ultrafiltration (UF) membrane prepared by a phase inversion method was reported in this paper. The effects of some factors in preparation on membrane performance

such as temperature and duration of heat-treatment

and polymer concentration

were studied. The pure water flux and retention of bovine serum albumin (BSA) and chymotrypsinum (CMP) used as ball standard matters by membrane have been quantitatively determined. The morphological structure of polyphenylquinoxaline UF membrane was observed by SEM. The results of experiments showed that the membrane exhibited better permeability and high selectivity

partcularly useful for the seqaration of BSA. When suitable preparing condi-tion were employed

the membranes showed good strength

high hydrolytic stability and high heat-resistant qualities. The upper limit of working temperature could reach 120℃.