Enhanced Thermal Transport Properties of Heat Spreader Assembled by Non-covalent Functionalized Graphene
Though the graphene paper consisting of a layer-by-layer stacked graphene nanosheets (GNs) has been widely used as heat spreader due to the high in-plane thermal conductivity; the drawback of graphene paper shows low through-plane thermal conductivity at same time. In this study, polyamine-functionalized perylene bisimide derivative (APBI)/graphene nanosheets hybrid papers (AGPs), with “brick-and-mortar” structure, were fabricated by noncovalent functionalization of GNs and APBI. The APBI can not only greatly improves the through-plane thermal transport; but also improves the mechanical properties of AGPs. The through-plane thermal conductivity of AGPs reach 6.67 W m-1 K-1 with 42.36 wt% of APBI and the tensile strength of AGPs reach 47.9 MPa with 14.22 wt% of APBI. The AGPs with both good thermal transport properties and mechanical properties is expected to be applied in thermal management applications as a heat spreader in industry.