▎ 摘　　要

NOVELTY - Hollow fiber nanofiltration membrane based on oxidized graphite comprises a polyimide hollow fiber film and an oxide graphene inner selection layer surface in the polyimide base film USE - Hollow fiber nanofiltration membrane based on oxidized graphite (claimed), for use in a solvent concentration such as Hexane EtOH, IPA, DMF, MeOH, and ACN. ADVANTAGE - The hollow fiber nano-filtration membrane has enhanced nanofiltration performance and has effectively inhibited the larger structure defect, and can be orderly assembled to the PI base film from bottom to top. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing hollow fiber nanofiltration membrane based on oxidized graphite, which involves preparing hollow fiber film, dispersing the oxidation graphene in water, and adding a certain amount of trimethylene tetramine cross-linking agent to form an oxidation graphene liquid, and using dead-end filtering method to coat the oxidation graphene liquid on the inner surface of the polyimide hollow fiber film to form a graphene oxide in the selected layer.