Abstract: The organicinorganic blended ultrafiltration membrane is synthesized by the phase transformation method, which mixed perovskite powder (CT powder) with polyvinylidene fluoride(PVDF). The pure water flux, oil rejection performance and antifouling property of ultrafiltration membrane were tested by the plate crossflow ultrafiltration device. The surface morphology, crosssectional morphology and the pollutants distribution of membrane were detected by using scanning electron microscope (SEM). The antifouling property and selfcleaning performance of CT/PVDF ultrafiltration membrane were tested by sewage experiments. The results show that adding 1% CT powder can greatly improve the flux of PVDF ultrafiltration membrane, slow down the rate of membrane flux decline and improve its antifouling property and selfpurification. In the oilwater separation experiment, the quality of penetrating fluid, such as turbidity, oil content and chemical oxygen demand are up to national emission standards.

Key words: PVDF; CT powder; ultrafiltration membrane; oilwater separation; antifouling property