▎ 摘　　要

NOVELTY - Dopamine-modified titanium dioxide oxidized graphite alkene polyamide nanofiltration membrane comprises polyether sulfone supporting component and organic functional layer arranged on polyether-sulfonate supporting component. The organic function layer comprises aqueous-phase monomer, organic phase monomer and acid-receiving agent as raw materials through interfacial polymerization reaction. The aqueous phase monomers contains dopamine-modified titanium dioxide, graphene oxide and piperazine. The organosilicone monomer is trimesoyl chloride, and acid receiving agent is polyamine. USE - Dopamine-modified titanium dioxide oxidized graphite alkene polyamide nanofiltration membrane used in biological engineering, medicine, metallurgy, water treatment, and electronic fields. ADVANTAGE - The dopamine-modified titanium dioxide oxidized graphite alkene polyamide nanofiltration membrane has high interception rate (more than 96%, pure water flux of 50-60 LHM) and high purity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of dopamine-modified titanium dioxide oxidized graphite alkene polyamide nanofiltration membrane, which involves: (a) preparing titanium dioxide nano particles by sol-gel method, then dopamine modifying to obtain dopamine modified titanium dioxide; (b) taking dopamine-modified titanium dioxide graphene oxide, and mixture of piperazine as water phase monomer, homophthaloyl chloride as organic monomer; (c) using polyamine as acid receiving agent; (d) forming organic functional layer on polyether sulfone support by interfacial polymerization reaction to obtain dopamine-modified titanium dioxide oxidized graphene polyamide nanofiltration membrane.