▎ 摘　　要

NOVELTY - A graphene oxide composite nanofiltration membrane preparing method involves performing interfacial polymerization on a porous base film with modified graphene as an aqueous monomer, where the porous base membrane is porous polymer film, the modified graphene oxide comprises a mixture of an aminated graphene, a hydroxylated graphene and a phenolic modified graphene, and an interfacial polymerized organic phase monomer comprises trimesoyl chloride, phthaloyl chloride, paraphthaloyl chloride, terephthaloyl chloride, and isophthaloyl chloride, and the organic solvent includes n-hexane. USE - Method for preparing graphene oxide composite nanofiltration membrane. ADVANTAGE - The method enables preparing graphene oxide composite nanofiltration membrane with relatively low operating pressure (0.2MPa), higher water flux and separation performance, in simple, easy and cost effective manner. DETAILED DESCRIPTION - A graphene oxide composite nanofiltration membrane preparing method involves performing interfacial polymerization on a porous base film with modified graphene as an aqueous monomer, where the porous base membrane is porous polymer film, the modified graphene oxide comprises a mixture of an aminated graphene, a hydroxylated graphene and a phenolic modified graphene, and an interfacial polymerized organic phase monomer comprises trimesoyl chloride, phthaloyl chloride, paraphthaloyl chloride, terephthaloyl chloride, and isophthaloyl chloride, and the organic solvent includes n-hexane, n-heptane, dodecane and trifluorotrichloroethane.