▎ 摘　　要

NOVELTY - A high-performance flatbed cellulose acetate/ graphene blended positive permeability film is obtained by preparing casting solution and keeping reaction temperature of casting solution comprising graphene oxide, dimethylformamide, acetone and polyethylene glycols or polyvinylpyrrolidone as additive and cellulose acetate. The casting solution is removed, poured into glass plate covered with support layer, scraped with a flat membrane scraper into a film, immersed in thermostat coagulation bath tank, deionized water is added, and washing with deionized water. USE - High-performance flatbed cellulose acetate/ graphene blended positive permeability film. DETAILED DESCRIPTION - A high-performance flatbed cellulose acetate/ graphene blended positive permeability film is obtained by preparing casting solution by adding 0.01-2 wt.% graphene oxide to dimethylformamide or dimethyl acetamide or N-methyl pyrrolidone, ultrasonic dispersing graphene oxide by using ultrasound, after the completion of the dispersion, adding acetone and 1-15 wt.% polyethylene glycols or polyvinylpyrrolidone as additive to the tank, uniformly stirring for 5-60 minutes, adding 5-25 wt.% cellulose acetate, stirring for 2-18 hours to uniformly dissolve at 5-75 degrees C, where the volume ratio of dimethylformamide or dimethylacetamide, or N-methylpyrrolidone:acetone is 1: 0.1-5. The flatbed cellulose acetate/titanium dioxide blended forward osmosis membrane preparation is performed by keeping reaction temperature of casting solution for 8-24 hours, removing casting solution, pouring a certain amount of casting solution into a glass plate covered with support layer, scraping with a flat membrane scraper into a film, immersing in thermostat coagulation bath tank at 15-80 degrees C, until the film is automatically formed from glass, adding deionized water for 24-48 hours, changing the water for every 12 hours, and washing with deionized water.