Multilayer Graphene Filled Epoxy Thin Film Composites: Transparency, Morphology and Thermal Conductivity

摘要

To date, multilayer graphene has captured tremendous attention of researchers around the world with its properties include ultra-light, yet immensely tough. It also can enhance the thermal properties of polymerbased composites at a very low loading compared with other carbon materials. The present work reports the transparency, morphology and thermal conductivity of multilayer graphene filled epoxy thin film composites. Multilayer graphene was loaded in epoxy system at 0.2vol% to 1.0vol%. Based on the observation, there are change in colour and transparency due to presence of multilayer graphene, the higher the filler loading, the darker it will get. Other than that, the morphology of multilayer graphene composites at 0.4vol% exhibits a relatively smooth fracture surface meanwhile rough fracture surface with many small faceted features were found at 1.0vol%. It is also found that multilayer graphene filled epoxy thin film composites show increment in thermal conductivity reached up to 0.4vol% filler loading and started to reduce thermal conductivity after increase the filler loading which may cause interfacial thermal resistance across a filler matrix interface.