▎ 摘　　要

NOVELTY - The method involves putting the graphene oxide film into the boat for stacking, and locking the fasteners at the same height as set. The heat treatment is performed to obtain a graphene foam film. The boat includes a bottom plate (4), a cover plate (1) and fasteners for fixing the bottom plate and the cover plate at a certain distance. The cover plate is a plate shape with a symmetrical structure. The fasteners include nuts (2), screws (3), bolts, bolts and tenon joints. The height between the lower surface of the cover plate and the upper surface of the bottom plate is 0.93-0.95 times the height of the laminated film after the fasteners are locked. The boat is composed of a bottom plate, a cover plate, a screw and a nut. The edge of the cover has symmetrically distributed holes perpendicular to the plane of the cover, and one end of the screw is vertically fixed on the inner surface of the bottom plate. The diameter corresponds to the size of the hole on the cover plate. USE - Method for preparing graphene foam film. ADVANTAGE - The method realizes effective use of the self-locking function formed after the screw and nut are screwed together, when the foam film expands, and the foaming thickness of the product is effectively suppressed by locking the cover plate. DETAILED DESCRIPTION - An INDEPENDENT claim is included for a boat for preparing graphene foam film. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the boat for preparing graphene foam film. Cover plate (1) Nut (2) Screw (3) Bottom plate (4)