High thermal conductive silicone grease containing graphene

Abstract

Silicone grease is a typical thermal interface material, which is used to improve the heat exchange efficiency in the junction between the heat source and the heat sink of electronic components. To increase the thermal conductivity of silicone grease, high thermal conductive additives (aluminum oxide, zinc oxide, graphite, aluminum powder…) are added and evenly dispersed in the based grease. Graphene is known as the material owning many excellent properties such as low density, high hardness, and high thermal conductivity. It suggests an approach to the application of graphene as an additive to enhance thermal conductivity of silicone grease. In this paper, we present some obtained results in the fabrication of high thermal conductive grease containing graphene. The 8000D Mixer/Mill (High-Energy Ball Mill) equipment was used to mix carboxylated graphene nanoplatelets (GNPs) and silicone. The thermal conductivity of the obtained grease was examined by Transient Hot Bridge THB100 equipment. The results exhibited that GNPs was efficient for the thermal conductivity enhancement of silicone grease, and it provided a thermal conductivity enhancement upto 230% with 1.00 vol.% of GNPs. The obtained results confirmed the advantages of graphene as an additive in grease for the heat dissipation of high power electronic devices