▎ 摘　　要

NOVELTY - The preparation method of high oil-absorption graphene composite material involves adding polyacrylonitrile nanofiber and deionized water to a container, electrostatically spinning the mixture to obtain a mixed liquid and then freeze-drying to obtain a three-dimensional polyacrylonitrile nanofiber foam, dispersing graphene oxide in deionized water and performing Hummers method to obtain a graphene oxide dispersion liquid, soaking the three-dimensional polyacrylonitrile nanofiber foam in graphene oxide dispersion liquid, adding hydrazine to the mixture, and drying. USE - The method is useful for preparation of high oil-absorption graphene composite material, which is useful for processing overflow oil and organic reagent leakage. ADVANTAGE - The method enables simple preparation of graphene composite material with excellent high oil absorption properties. DETAILED DESCRIPTION - The preparation method of high oil-absorption graphene composite material involves adding polyacrylonitrile nanofiber and deionized water to a container, uniformly mixing, electrostatically spinning the mixture to obtain a mixed liquid and then freeze-drying to obtain a three-dimensional polyacrylonitrile nanofiber foam, dispersing graphene oxide in deionized water and then performing Hummers method to obtain a graphene oxide dispersion liquid, soaking the three-dimensional polyacrylonitrile nanofiber foam in graphene oxide dispersion liquid and then freeze-drying under vacuum to obtain a graphene oxide/polyacrylonitrile composite material, adding hydrazine to the composite material and then washing using water and alcohol, and drying.