The invention discloses a
graphene film /
copper hot-pressing composite directional high-thermal-
conductivity material as well as a preparation method and application of the
graphene film /
copper hot-pressing composite directional high-thermal-
conductivity material. The preparation method comprises the following steps:
punching a
graphene film to form a plurality of hole structures; blade-
coating copper paste on the surface to form a liquid film; the copper paste comprises copper
powder, a
coupling agent and an organic phase; stacking a plurality of
layers; carrying out
hot pressing treatment on the circulating laminated structure; and
slicing to obtain the graphene film / copper hot-pressing composite oriented high-thermal-
conductivity material. When copper
powder particles are embedded into the hole structure, the whole hole structure is filled with the copper
powder particles, the copper powder particles can transversely enter gaps between graphene sheet
layers, a three-dimensional
interlocking structure is formed through the
sintering effect, resin contained in the copper paste can be subjected to a
carbonization reaction in the glue discharging stage, a
carbon skeleton is formed, and therefore the three-dimensional
interlocking structure is formed. And the infiltration process between the copper powder and the graphene sheet layer is facilitated, and finally the heat conduction performance and the mechanical performance of the graphene film / copper hot-pressing composite oriented high-heat-conduction material are remarkably improved.