Abstract
This study reports the development of graphene/silver nanowire (AgNWs) /silicone rubber nanocomposites with high thermal conductivity. Silicone rubber (SR) processes unusual properties with soft, stable, non-toxic, and non-flammable preperties, however, its thermal conductivityis low. For improving the thermal conductivity, AgNWs and graphene with high thermal conductivity were added to silicone rubber nanocomposites. In the first part, chemical modification of graphene was by two different methods. The products were assigned to AA-RGO and AA-GNP, respectively. And then AA-RGO/SR, AA-GNP/SR, and unmodified GNP/SR nanocomposites were prepared by solution mixing method. Results indicate that the thermal conductivity of 10 phr AA-RGO/SR nanocomposites increase form 0.180 W/mK to 0.412 W/mK, which processes better thermal conduction than the other nanocomposites. In the second part, to further enhance thermal conductivity of AA-RGO/SR nanocomposites, AgNWs modified by thiophenol (mAgNWs) are added. The thermal conductivity of silicone rubber nanocomposites which contains 10 phr AA-RGO and 10 phr mAgNWs increases from 0.18W/mK to 1.289 W/mK, and the coefficient of thermal expansion (CTE) reduces from 310μm/m℃ to 155.5μm/m℃.