▎ 摘　　要

NOVELTY - Preparation of reduced graphene oxide/ZIF-8 composite nanomaterial comprises dissolving bottom film macromolecule ultrafiltration membrane material polymer in organic solvent, adding polyvinyl pyrrolidone, acetone and polyethylene glycol, preparing casting solution, and preparing porous supporting bottom film by phase inversion method; cleaning, dispersing reduced graphene oxide/ZIF-8 composite material in buffer solution, sonicating, adding dopamine hydrochloride, co-depositing on porous supporting bottom film, cleaning, and heating; and placing in the polyamine aqueous solution, removing surface residual solution, drying, taking polybasic acyl chloride-oil phase solution for interfacial polymerization reaction, removing residual solution, heating, and placing in deionized water to store. USE - The method is used for preparing reduced graphene oxide/ZIF-8 composite nanomaterial as interlayer modified nanofiltration membrane (claimed). ADVANTAGE - The method enables preparing the composite nano-material with improved hydrophilicity, enhanced dispersibility of the water phase solution, and reduced agglomeration to the surface nanofiltration membrane by the defect and improves selectivity and improved permeability of the film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for reduced graphene oxide/ZIF-8 composite nanomaterial.