A novel amphiphilic copolymer having polysulfone (PSF) backbone and poly［poly(e thylene glycol) methyl ether methacrylate］ side chains［PSF-g-P(PEGMA)］ was synthesized by ATRP

using chloromethylated polysulfone as macroinitiator.The resultant copolymer was characterized by FT-IR and 1H-NMR.The molecu lar weight of PSF-g-P(PEGMA) was calculated as 6.34×104 based on 1H-NMR analysis

the molar fraction and weight fraction of P(PEGMA) in the co polymer was 0.711 and 39.6 wt%

respectively.A series of PSF blend membranes co ntaining various amounts of PSF-g-P(PEGMA) were prepared by the wet phase inversion process and were characterized by SEM

XPS

water contact angle and bovi n serum albumin (BSA) adsorption.The experimental results showed that the introd uction of PSF-g-P(PEGMA) can significantly improve the hydrophilicity and fouling-resistance of PSF membranes.For instance

the initial water contact angl e of the PSF membrane containing 20 wt% PSF-g-P(PEGMA) was 43.5°.After 50 s

the blend membrane was completely wetted by water.The apparent BSA adsorptio n amount of the same membrane was extremely low compared to that of the pure PSF membrane.