▎ 摘　　要

NOVELTY - Graphene oxide/polyacrylamide composite filter film comprises high molecular polyacrylamide as nano-sized water flux produced by spacers of graphene oxide sheets and a composite film of graphene oxide and polyacrylamide having enhanced filtration performance. The composite film has a stacked structure of graphene oxide sheets. The surface of each graphene oxide sheet in the structure is uniformly adhered with a hydrophilic flexible polymer polyacrylamide by electrostatic adsorption. The composite film comprises 90 plus minus 3% graphene oxide and 10 plus minus 3% polyacrylamide having a molecular weight of 1-3 million. The change of the amount of polyacrylamide added can affect the interlayer spacing of the graphene oxide sheets in the composite film structure. The layer spacing of the graphene oxide sheets is increased if the amount of polyacrylamide added increases. USE - The graphene oxide/polyacrylamide composite filter film is useful for preparing water flux and filter performance equipment (claimed). ADVANTAGE - The composite filter film: has superior hydrophilicity to a graphene oxide film; and has excellent water flux and filtration performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene oxide/polyacrylamide composite filter film comprising (a) preparing 0.5-1 mg/ml aqueous solution of graphene oxide, and dispersing ultrasonically until uniform, (b) preparing 0.05-0.1 mg/ml polyacrylamide aqueous solution having a molecular weight of 1-3 million, and stirring at room temperature until completely dissolved, (c) adding the aqueous solution of polyacrylamide into the aqueous graphene oxide solution in a drop wise manner under stirring, where the amount of graphene oxide is 90 plus minus 3% and polyacrylamide is 10 plus minus 3% to obtain graphene oxide/polyacrylamide composite, and (d) taking a graphene oxide/polyacrylamide composite, filtering via a film by vacuum filtration, drying the film naturally to obtain graphene oxide/polyacrylamide composite filter film, taking graphene oxide/polyacrylamide complex to be filtered, where the thickness of the graphene oxide/polyacrylamide composite filter film is different, the amount of suction filtration is large and the thickness of the film is thick.