▎ 摘　　要

NOVELTY - Method for preparing solvent resistant, stain resistant, graphene nanofiltration membrane, involves adding 0.2-0.4 ml prepared graphene dispersion to 30 ml solvent, adding layer spacing regulator to the mixture, reacting the mixture at 40-60 degrees C for 2-4 hours, cooling the mixture to room temperature, adding 0.07-0.12 mg/ml homemade graphene to the mixture, forming nanofiltration membrane having a graphene separation layer on the surface of the polymer membrane by filtration, spin coating, spraying or brushing process, and drying the membrane. USE - The method is useful for preparing solvent resistant, stain resistant, graphene nanofiltration membrane which is used in treatment and desalination of sewage (all claimed). ADVANTAGE - The method prolongs service life. DETAILED DESCRIPTION - Method for preparing solvent resistant, stain resistant, graphene nanofiltration membrane, involves adding 0.2-0.4 ml prepared graphene dispersion to 30 ml solvent, adding layer spacing regulator to the mixture, reacting the mixture at 40-60 degrees C for 2-4 hours, cooling the mixture to room temperature, adding 0.07-0.12 mg/ml homemade graphene to the mixture, forming nanofiltration membrane having a graphene separation layer on the surface of the polymer membrane by filtration, spin coating, spraying or brushing process, and drying the membrane at room temperature or in storage solvent, where the amount of graphene loaded in the nanofiltration membrane is 20-68 mg/m2.