▎ 摘　　要

NOVELTY - Preparation of graphene microporous foam comprises performing heat treatment of graphene at 800-1500 degrees C under inert atmosphere, dispersing in dimethylformamide, adding polyurethane pellets, stirring and dissolving, coating, placing under air for micro-phase separation to obtain polyurethane/graphene composite foam, heating and carbonizing, and removing polyurethane matrix to obtain graphene microcellular foam with oriented polyurethane cell wall and continuous skeleton structure. USE - The method is for preparing graphene microporous foam used for electromagnetic shielding field (claimed). ADVANTAGE - The method is simple and fast.