▎ 摘　　要

NOVELTY - Graphene oxide modified polydopamine composite nanofiltration membrane comprises polyethersulfone support and organic functional layer arranged on polyethersulfone support. The organic functional layer is formed on polyethersulfone support by interfacial polymerization reaction using aqueous phase monomer, organic phase monomer and acid acceptor as raw material. The aqueous phase monomer includes polydopamine and graphene oxide. The organic phase monomer is trimesoyl chloride. The acid acceptor is polyamine. USE - Graphene oxide modified poly-dopamine composite nano-filtration membrane used in biological engineering, medicine, metallurgy, and water treatment. ADVANTAGE - The graphene oxide modified poly-dopamine composite nano-filtration membrane has high air permeability, low density, good film forming property, cost-effective and good flexibility, and improved hydrophilicity and roughness of the surface of the membrane layer so as to improve the water flux of membrane layer. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene oxide modified polydopamine composite nanofiltration membrane, which involves: (A) using a mixture of polydopamine and graphene oxide as the aqueous phase monomer; (B) using phthaloyl chloride as an organic monomer; (C) using polyamines as acid acceptor; and (D) forming the organic functional layer on the polyethersulfone support through an interfacial polymerization reaction to obtain the graphene oxide modified polydopamine composite nanofiltration membrane.