▎ 摘　　要

NOVELTY - Anti-pollution gradient ultrafiltration membrane is obtained by chemically bonding the surface of graphene oxide to magnetic nanoparticles graphene by oxide-magnetic nanoparticle hybrid, uniformly mixing graphene oxide-magnetic nanoparticle hybrid, organofluorosilane and porogen in polymer polysulfone PSf solution, and using solution casting method and magnetic field-assisted non-solvent induced phase transformation. USE - As anti-pollution gradient ultrafiltration membrane. ADVANTAGE - The membrane has low separation efficiency and low flux recovery rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing the anti-pollution gradient ultrafiltration membrane, which involves grafting magnetic nanoparticles on the surface of graphene oxide, uniformly dispersing graphene oxide (GO) in an aqueous solution by ultrasound, adding GO with carboxyl functional groups on the surface activated by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)/N-hydroxysuccinimide (NHS) catalyst, adding magnetic nanoparticles, vigorously stirring to obtain graphene oxide-magnetic nanoparticle hybrid, selecting the high molecular polymer PSf as membrane matrix, dissolving in N,N-dimethylacetamide (DMAc), adding the graphene oxide-magnetic nanoparticle hybrid, organofluorosilane and porogen, performing ultrasonic dispersion and static vacuum degassing, adding mixed liquid on a glass plate under the action of a magnetic field, scraping into a liquid film with specified thickness, and soaking in coagulation bath to solidify into membrane to obtain gradient ultrafiltration membrane.