Ultrahigh thermal conductivity of epoxy composites based on curling bioinspired functionalized graphite films for thermal management application
writer：Yingchun Liu, Bing Chen, Kun Wu and et al.
keywords：Graphite film, Epoxy, Thermal conductivity, Thermal conductive network
source：期刊
specific source：Composites Part A: Applied Science and Manufacturing
Issue time：2021年
Unsatisfactory thermal conductive network (TCN) and poor heat conduction interface have limited thermal conductivity (TC) enhancement in the polymeric composites. In this study, inspired by mussels and a Chinese delicacy called the Hanamaki, a facile and environmental strategy is developed to prepare hierarchically ordered graphite film strips@polydopamine/epoxy (GFs@PDA/EP) composites. Organized TCNs and an optimized interface were constructed and thus an ultrahigh TC of GFs/EP (899.44 ± 18.51 W m?1 K?1) in perpendicular direction was obtained. Structural analysis and heat-transfer passages model suggests that superior TCNs were constructed and the designed structure is conducive for heat conduction in the perpendicular direction. Moreover, the interfacial bonding of GFs@PDA with EP matrix contributes to the remarkable enhancement of TC with increasing of PDA coverage. A decrease of ~43 °C in the thermal management experiment of LED chips indicated that it most likely becomes a good candidate in electronic device-cooling application.