▎ 摘　　要

NOVELTY - Processing coating technology of graphene composite material filter membrane involves coating of polydopamine-graphene on different substrates uses dopamine as a reducing agent, so that graphene oxide self-assembles into a three-dimensional porous network structure under hydrothermal conditions, covering the substrate. The synthesis of P(MEO2MA-co-OEGMA-SH) copolymer is based on 2-methyl-2acrylic acid-2(2methoxyethoxy) ethyl ester, oligoethylene glycol methyl ether methacrylate It is a monomer, bis(2-(2'-bromoisobutyryloxy)ethyl) disulfide is an initiator, cuprous bromide is a catalyst, and 2,2'-bipyridine is a ligand. The transfer radical polymerization is performed to synthesize P(MEO2MA-co-OEGMA-SS-MEO2MA-co-OEGMA) copolymer, and then used tributylphosphine as a reduction catalyst to break the disulfide bond in the polymer to obtain a P (MeO2MA-co-OEGMA-SH) polymer with a mercapto group at the end. USE - Method for processing coating technology of graphene composite material filter membrane. ADVANTAGE - The method enables to process coating technology of graphene composite material filter membrane which has strong practicability and can be applied to most substrates. It has good mechanical properties and long service life. The proposed coating process is simple and easy to implement, cost-effective, wide application range, and broad application prospects. DETAILED DESCRIPTION - Processing coating technology of graphene composite material filter membrane involves coating of polydopamine-graphene on different substrates uses dopamine as a reducing agent, so that graphene oxide self-assembles into a three-dimensional porous network structure under hydrothermal conditions, covering the substrate. The synthesis of P(MEO2MA-co-OEGMA-SH) copolymer is based on 2-methyl-2acrylic acid-2(2methoxyethoxy) ethyl ester, oligoethylene glycol methyl ether methacrylate is a monomer, bis(2-(2'-bromoisobutyryloxy)ethyl) disulfide is an initiator, cuprous bromide is a catalyst, and 2,2'-bipyridine is a ligand. The transfer radical polymerization is performed to synthesize P(MEO2MA-co-OEGMA-SS-MEO2MA-co-OEGMA) copolymer, and then used tributylphosphine as a reduction catalyst to break the disulfide bond in the polymer to obtain a P (MeO2MA-co-OEGMA-SH) polymer with a mercapto group at the end. The grafting process of the polymer on the membrane substrate under alkaline conditions through the Michael addition reaction. The P (MeO2MA-co-OEGMA-SH) polymer with mercapto groups at the end is grafted on the polydopamine-graphene coated substrate to form a super-hydrophilic oil-water filtration membrane.