▎ 摘　　要

NOVELTY - Ultrafiltration membrane comprises polyvinylidene fluoride (PVDF) as base membrane material, non-mechanical membrane material comprising inorganic nanoparticles having a particle diameter of 10-30 nm, and functional film-forming material comprising graphene oxide. The non-mechanical membrane material and functional film-forming material are distributed in the base membrane material, where the mass ratio of non-mechanical membrane material and functional film-forming material is 8:(1-8). USE - The ultrafiltration membrane is useful for sewage treatment (claimed). ADVANTAGE - The ultrafiltration membrane has high membrane flux (above 400 l/(m2.hour)), excellent retention rate (more than 89%), excellent anti-pollution ability (more than 60%), excellent mechanical strength, tensile strength of more than 15N, and elongation at break of more than 4.5%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the ultrafiltration membrane, comprising preparing the ultrafiltration membrane by the non-mechanical membrane material, functional film-forming material, base membrane material and solvents through the immersion precipitation phase inversion method, where the immersion precipitation phase inversion method comprises material mixing, water bath stirring, ultrasonic treatment, leaving still and maturation, film scraping, water bath coagulation and film formation.