▎ 摘　　要

NOVELTY - The method for preparation of poly-m-phenylene isophthalamide nanofiltration membrane, involves adding crosslinking agent to aqueous organic solvent (I) to obtain crosslinking solution, dissolving graphene oxide nanosheets in organic solvent (II), obtaining graphene oxide solution, dripping acid binding agent solution on surface, dripping crosslinking solution on surface, removing excess solution using silica gel roller, dripping graphene oxide solution on the surface, drying and heating to obtain poly-m-phenylene isophthalamide nanofiltration membrane. USE - Method for preparation of poly-m-phenylene isophthalamide nanofiltration membrane (claimed). ADVANTAGE - The method ensures simple process, retains the characteristics of poly-m-phenylene isophthalamide nanofiltration membrane, enhances the hydrophilic membrane surface and improves the stain resistance of the membrane. DETAILED DESCRIPTION - Method for preparation of poly-m-phenylene isophthalamide nanofiltration membrane, involves adding crosslinking agent to aqueous organic solvent (I), mixing evenly, obtaining 0.1-0.3 %mass crosslinking solution, dissolving graphene oxide nanosheets in organic solvent (II), ultrasonically processing, obtaining 0.1-3 %mass graphene oxide solution, laying dried poly-m-phenylene isophthalamide nanofiltration membrane on a glass plate, dripping 0.1-0.3 wt.% acid binding agent solution on surface for 1-10 minutes, decanting remaining solution, placing in ventilated cupboard, dripping crosslinking solution on the surface for 2-15 minutes, removing excess solution using silica gel roller, dripping graphene oxide solution on the surface for 1-15 minutes, decanting remaining solution, drying and heating the membrane in an oven at 45-80 degrees C for 60-180 seconds to obtain poly-m-phenylene isophthalamide nanofiltration membrane. The organic solvent (I) is selected from n-hexane, dichloromethane and/orIsopar-G (RTM: high-purity synthetic isoparaffin). The organic solvent (II) is selected from dimethylacetamide, dichloromethane and/or Isopar-G (RTM: high-purity synthetic isoparaffin).