▎ 摘　　要

NOVELTY - Preparing graphene foam-poly dopamine composite film comprising e.g. (i) adjusting pH of graphene oxide solution, adding dopamine hydrochloride, ultrasonic dispersing to obtain precursor, then subjecting to hydrothermal reaction to obtain gel type product, and drying to obtain graphene foam-poly dopamine, and (ii) subjecting product obtained in step (i) to grinding, adding N,N-dihydroxyethylglycine for ultrasonic dispersion, then mixing with N,N-dihydroxyethylglycine solution in which thermosensitive polymer is dissolved and filtering to obtain final product. USE - The composite film is useful for oil-water separation (claimed). ADVANTAGE - The composite film has excellent temperature sensitivity, excellent super-hydrophilic and underwater ultra-oleophobic properties. DETAILED DESCRIPTION - Preparing graphene foam-poly dopamine composite film comprising (i) adjusting pH of graphene oxide solution to alkaline, then ultrasonicating, then adding dopamine hydrochloride to graphene oxide solution and ultrasonic dispersing to obtain precursor solution, then subjecting precursor solution to hydrothermal reaction to obtain gel type product, and drying to obtain grapheme foam-poly dopamine, and (ii) subjecting product obtained in step (i) to grinding, adding to N,N-dihydroxyethylglycine for ultrasonic dispersion to obtain graphene foam-poly dopamine/N,N-dihydroxyethylglycine disperse, mixing with N,N-dihydroxyethylglycine solution in which thermosensitive polymer is dissolved, stirring, and then vacuum suction filtering to obtain final product. An INDEPENDENT CLAIM is also included for graphene foam-poly dopamine composite film is prepared by above mentioned method.