▎ 摘　　要

NOVELTY - The preparation of graphene oxide nanofiltration membrane involves (S1) using expanded graphite as raw material, adding concentrated sulfuric acid, potassium permanganate, hydrogen peroxide solution, and preparing a graphene oxide aqueous solution by modified Hummmers method, (S2) adding an amine monomer to the aqueous graphene oxide solution to prepare an aqueous graphene oxide casting solution, (S3) using a high molecular polymer ultrafiltration membrane as a base film, dip coating a layer of graphene oxide aqueous casting solution on the base film by surface coating method, the dip coating time is 1-5 minutes, re-dip coating a layer of oil, the dip coating time is 1-30 minutes, performing interfacial polymerization of the graphene oxide aqueous casting solution and the oil phase monomer, and drying at 60-100 degrees C for 5-10 hours. USE - Preparation of graphene oxide nanofiltration membrane. ADVANTAGE - The cleaning effect is achieved after parallel washing, so that the nanofiltration membrane has excellent filtering ability and stain resistance, thus significantly improving the service life.