Self-assembly and thermal conductivity of compressible Graphene/Carbon nanotubes

The heat dissipation problem of high power devices has become one of the key bottlenecks to solve the technology of the electronic information industry. Therefore, in addition to improving the thermal conductivity of the thermal interface material itself, it is necessary to improve the compression resilience of the thermal interface material to reduce its contact thermal resistance in practical applications. The modified Hummers method was used to optimize the preparation of graphite oxide, and acidified carbon nanotubes were used as the bridge connecting the walls of graphite oxide. The graphene/carbon nanotubes aerogel was obtained by reducing graphite oxide with ascorbic acid by self-assembly. The thermal conductivity and compression properties of the aerogel were studied. It was found that the self-assembled aerogels had excellent compressive resilience and the thermal conductivity could reach about 4 W/m·K at 80% compression. The aerogel provides a simple and feasible new way for the preparation of elastic thermal interface materials in electronic packaging.