▎ 摘　　要

NOVELTY - The method involves adding the graphene oxide into pure water, freezing the turbid liquid and introducing into freezing dryer for 48h, paving the graphene oxide powder on the ground electrode of the low temperature plasma processing device for processing for 10-15min, mixing the modified graphene oxide with dopamine solution, soaking the polyether sulfone ultra-filtration membrane with RO water, removing the redundant water beads on the surface of the soaked base membrane by a roller wheel and fixing it on the mold, pouring the aqueous phase and removing the redundant water to the surface without obvious water ball by roller wheel, pouring the modified graphene oxide suspension on the surface of the film to carry out surface grafting reaction. USE - Method for preparing oxidized graphite alkenyl ultra-filtration membrane. ADVANTAGE - The method has a water contact angle of about 15 degrees , good hydrophilicity, a maximum water flux of 283.2L/m2, and a sodium sulfate rejection rate of 97.3%.