▎ 摘　　要

NOVELTY - The method involves arranging graphene thin film on porous grid, and obtaining graphene thin film and porous grid. The water droplets are set on the surface of the graphene film of the graphene film and porous grid. The topography of the water droplets on the surface of the graphene film is obtained by an environmental scanning electron microscope. The contact angle of the water droplet is calculated or directly measured through the topography diagram. The porous grid is a porous film or a porous metal grid. USE - Method for evaluating hydrophilicity of graphene film. ADVANTAGE - The method uses the graphene film that is not disturbed by the substrate as the evaluation object, and eliminates the influence of the substrate on the graphene hydrophilicity measurement. A clearer topography of water droplets on the surface of the graphene film is obtained, through the use of environmental scanning electron microscopy. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the method for evaluating hydrophilicity of graphene film.