▎ 摘　　要

NOVELTY - Graphene-enhanced thermally conductive polymer-based composite film comprises first film layers and second film layers stacking and arranged alternately. The first film layer is at least prepared from the polycarbonate matrix and the porous carbon loaded with graphene by the solvent method, and the second film layer is at least prepared from the polycarbonate matrix and the porous carbon loaded with the thermally conductive filler by the solvent method. USE - The graphene-enhanced thermally conductive polymer-based composite film is useful for heating electronic device or refrigeration element. ADVANTAGE - The graphene-enhanced thermally conductive polymer-based composite film: has simple preparation technique, high production efficiency, controllable product performance, stable quality, good film flexibility, good insulation, high mechanical strength and good radiating effect and good uniformity; and can form a dense continuous heat conducting network, increase the radiating area and radiating speed of the single-layer film to reach the effect of cool the working temperature of the heating source; is economical; and film forming method is convenient and fast and stable with the graphene through the principle of dissolving and separating out thus dissolves the polycarbonate in the organic solvent, gradually separates out the porous carbon and graphene, and further strengthens of the film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene-enhanced thermally conductive polymer-based composite film, comprising (i) dissolving the polycarbonate substrate in the organic solvent to form a first dispersion, adding the first dispersion to obtain the film-forming liquid, heating the film-forming liquid and volatilizing organic solvent to obtain the first film layer; (ii) dissolving the prepared polycarbonate substrate in the second film layer to form organic solvent second dispersion liquid, adding the carbon with porous-conducting filler into the first dispersion liquid to obtain the film-forming liquid, heating the film-forming liquid and volatilizing organic solvent to obtain the second film layer; and (iii) stacking the first film layer and the second film layer alternately, solidifying by hot pressing and cooling.