▎ 摘　　要

NOVELTY - A graphene oxide-cellulose acetate composite membrane preparing method involves preparing graphene oxide powder. The graphene oxide powder is dispersed in formamide. The solution is added with casting solution, stirred, dissolved, mixed and dispersed to obtain mixed material. The mixed material is allowed for degassing,, followed by scraping composite membrane casting solution film, performing volatilization, heating at 70-90 degrees C for 5-10 minutes, removing and rinsing to obtain the finished product. USE - Method for preparing graphene oxide-cellulose acetate composite membrane. ADVANTAGE - The method enables preparing composite membrane with good energy saving capacity and good application prospect. DETAILED DESCRIPTION - A graphene oxide-cellulose acetate composite membrane preparing method involves preparing graphene oxide powder by freeze-drying graphene oxide solution to obtain graphene oxide powder. The graphene oxide powder is dispersed in formamide to obtain a uniform graphene oxide-formamide solution. The graphene oxide-formamide solution is added with casting solution of cellulose acetate and acetone, stirred, dissolved, mixed and dispersed to obtain mixed material. The mixed material is allowed for degassing after casting solution treatment, allowed to stand at a low temperature to remove residual bubbles, followed by scraping composite membrane casting solution film, performing volatilization, heating at 70-90 degrees C for 5-10 minutes, removing and rinsing to obtain the finished product, where the casting solution is 15-30 wt.% cellulose acetate, 0.0001-0.01 wt.% graphene oxide, 10-35 wt.% formamide and 35-70 wt.% acetone.