Method for preparing graphene phase change composite heat dissipation film through rolling and hot pressing

The invention discloses a method for preparing a graphene phase change composite heat dissipation film through rolling and hot pressing. The method comprises the following steps: carrying out ball milling on a graphene nanosheet, a phase change material and a binder to obtain a mixture A, and rolling the mixture A to obtain a precursor film; and laminating the two precursor films and then carrying out hot pressing to obtain the graphene phase-change composite heat dissipation film. According to the method disclosed by the invention, an organic solvent or high-temperature heating is not needed, the graphene sheet layer and the phase-change material can be quickly and uniformly compounded into the film, and the heat-conducting property and the mechanical property of the graphene phase-change composite heat dissipation film are improved. 本发明公开了一种利用辊压和热压制备石墨烯相变复合散热膜的方法。其中，所述方法包括：将石墨烯纳米片和相变材料与粘结剂球磨得混合物A，将混合物A辊压获得前体膜；将两张前体膜贴合后进行热压，得到石墨烯相变复合散热膜。本发明方法不需要使用有机溶剂或高温加热，能够快速、均匀地将石墨烯片层和相变材料复合成薄膜，提高石墨烯相变复合散热膜的导热性能和机械性能。