▎ 摘　　要

NOVELTY - Producing an oxidized graphene-modified organic polymer nanofilter membrane involves placing dopamine tris buffer solution on the surface of organic microfiltration or ultrafiltration membrane, then self-polymerizing the dopamine to form pDA layer by slow shaking. The thickness of pDA layer is controlled by polymerization time. Functional layer of pDA/TMC is obtained by adding TMC isomer-G solution into pDA-coated membrane surface to, where pDA reacted with TMC to form amide bond. USE - Method for producing an oxidized graphene-modified organic polymer nanofilter membrane (claimed). ADVANTAGE - The method enables to produce an oxidized graphene-modified organic polymer nanofilter membrane has anti-compaction property, reduces surface roughness and mask the surface carboxyl group, and also improves the anti-pollution performance. DETAILED DESCRIPTION - Producing an oxidized graphene-modified organic polymer nanofilter membrane involves placing dopamine tris buffer solution on the surface of organic microfiltration or ultrafiltration membrane, then self-polymerizing the dopamine to form pDA layer by slow shaking. The thickness of pDA layer is controlled by polymerization time. Functional layer of pDA/TMC is obtained by adding TMC isomer-G solution into pDA-coated membrane surface to, where pDA reacted with TMC to form amide bond. The carboxyl group of pDA/TMC functional layer is activated by adding EDC and NHS in MES buffer solution on the surface of the membrane. NHS is catalyzed, and pDA and TMC further reacted to form multiple amide bond. The degree of cross-linking is increased. The ethylenediamine HEPES buffer solution is added to the surface of the membrane. Activated carboxyl group is reacted with amino group at one end of the ethylenediamine to form an amide bond, and another end of ethylenediamine is attached to the membrane surface. A solution of surface-activated carboxylated graphene oxide is added to the solution. The surface of the film is connected to the surface of the membrane and unreacted amino group at the other end of the ethylenediamine is reacted with the carboxyl group activated by the graphene oxide to form an amide bond. Oxidized graphene is fixed on the surface of the film to form an oxidized graphene-modified layer and the thickness of the modified layer is controlled to a predetermined value by controlling the number of repetitions to obtain oxidized graphene-modified organic polymer nanofilter membrane.