▎ 摘　　要

NOVELTY - Preparing graphene oxide-polyethylene glycol/polyvinylidene fluoride composite ultrafiltration membrane involves esterfying graphene oxide and polyethylene glycol to form graphene oxide-polyethylene glycol, which is used as a hydrophilic material for later use. A set amount of graphene oxide-polyethylene glycol is dissolved in a solvent of N,N-dimethylformamide, and performed ultrasonic dispersion. A set amount of polyvinylidene fluoride and polyvinylpyrrolidone are added to the ultrasonically dispersed solution to form a blend system, and stirred and dissolved to a uniform solution in a water bath at a set temperature, and left to degas to obtain a casting solution. The casting liquid is scrapped on the glass plate to form a film with a film wiper, put into the coagulation bath for phase separation, taken out, and rinsed with distilled water, and produced graphene oxide-polyethylene glycol/polyvinylidene fluoride composite ultrafiltration membrane and store in distilled water. USE - Method for preparing graphene oxide-polyethylene glycol/polyvinylidene fluoride composite ultrafiltration membrane for separating bovine serum albumin (claimed). ADVANTAGE - The method enables to prepare graphene oxide-polyethylene glycol/polyvinylidene fluoride composite ultrafiltration membrane, where water flux of the composite ultrafiltration membrane is greatly improved, and at the same time, the hydrophilicity is also significantly enhanced, and it shows excellent anti-pollution performance.