▎ 摘　　要

NOVELTY - Graphene polyvinylidene fluoride or polyvinylidene difluoride (PVDF) conductive ultrafiltration membrane comprises PVDF support thin layer, and thin layer of graphene adhered to the surface of the PVDF support thin layer, where the thin layer of graphene having artificially distributed defect which is a pore and the inside has a hydrophilic functional group. USE - As graphene PVDF conductive ultrafiltration membrane. ADVANTAGE - The membrane has good conductivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) method of preparing the graphene PVDF conductive ultrafiltration membrane, involves etching several embossed pits on surface of the copper foil using a laser hole forming technique, growing several thin layers of graphene on the surface of the copper foil to form a thin layer of graphene having defects, mixing dimethylacetamide, polyvinylidene fluoride and polyvinylpyrrolidone to obtain casting solution, uniformly coating the casting solution on the thin layer of graphene of the copper foil, integrating the copper foil into water to perform phase conversion into film, removing excess casting solution on the formed copper foil, placing the copper foil in nitric acid solution, and dissolving copper foil by nitric acid; and (2) method for removing surface contaminants of graphene PVDF conductive ultrafiltration membrane, involves using membrane module made of graphene PVDF conductive ultrafiltration membrane as an anode and a titanium sheet as cathode, forming the electrolytic cell system, introducing the electrolyte into membrane module for cleaning, applying voltage across the electrolytic cell system, and reversing the voltage reversed during the rinsing process until the surface of the membrane.