【Abstract】 Grafting of maleic anhydride/styrene onto PVDF porous membrane was performed in the presence of supercritical carbon dioxide （SCCO₂） as a solvent and swelling fluid.The copolymer of maleic anhydride and styrene （SMA） was grafted onto the out and inner surface of PVDF pores membrane by passing through the membrane pores,which was confirmed by ATR-FTIR and XPS measurements.The SEM photographs of the grafted membrane showed that the membrane structure was hardly changed,except for some jams of the out surface.It was found that the water contact angle of the out surface was reduced more than the inner surface.The membrane biocompatibility corresponding to protein adsorption was improved significantly with the grafting of SMA onto the surface of the PVDF membrane.The effects of SCCO₂ pressure and the comonomer and initiator concentrations were invesgated.更多还原