▎ 摘　　要

NOVELTY - A lyophilic polyvinylidene fluoride/graphene oxide-lysine composite film is obtained by graphene oxide-lysine as additive to modify polyvinylidene fluoride membrane to obtain lyophilic polyvinylidene fluoride/graphene oxide-lysine composite film. USE - Lyophilic polyvinylidene fluoride/graphene oxide-lysine composite film for use in water treatment (claimed), sea water treatment, brackish water desalination process and water purification filters. ADVANTAGE - The film has better anti-pollution performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing lyophilic polyvinylidene fluoride/graphene oxide-lysine composite film, which involves adding graphene oxide power with deionized water, performing sonication process at 200 W for 2 hours, adding lysine and dicyclohexylcarbodiimide dehydrating agent, stirring magnetically at 60-70 degrees C for 24 hours, performing dialysis treatment and freeze-drying to obtain graphene oxide-lysine compound, followed by adding polyvinylidene fluoride, polyvinylpyrrolidone pore forming agent and N-methyl-2-pyrrolidone, stirring at 50-70 degrees C for 24 hours to obtain uniform casting solution, cooling, performing de-foaming treatment, scraping film by using scraper, placing into coagulation bath at 40-60 degrees C for 15 minutes by using deionized water, removing composite film in coagulation bath, washing with deionized water for 48 hours and drying naturally to obtain finished product.