Enhanced Thermal Conductivity And Retained Electrical Insulation Of Epoxy Composites Filled With Cu@Batio3 Core-Shell Particles

The application of polymer for thermal interface materials is limited by its low thermal conductivity. In this work, barium titanate coated Cu core-shell particles were prepared and then employed as thermal conductive fillers to reinforce epoxy matrix. The results indicate that thermal conductivity of the Cu@BaTiO3/epoxy composites reaches 1.09 W m(-1)K(-1) at 10 vol% loading, achieving 580% elevation on neat epoxy matrix. Meanwhile, the composites retain high electrical insulation (7.90 x 10(13) Omega.cm) due to the existence of insulative BaTiO3 layer on Cu surface. This study will provide a novel insight of the design of functionalized core-shell thermal conductive fillers and construction of high-performance thermal interface materials.