Anisotropically enhancing thermal conductivity of epoxy composite with a low filler load by an AlN/C fiber skeleton

Constructing a three-dimensional (3D) heat conduction skeleton has been considered as an effective method to efficiently enhance the thermal conductivity of polymer-based composites at a low filler load. Herein, a 3D thermal transport skeleton based on AlN/C was fabricated via the direct pyrolysis and carbothermic reduction reaction of vertically arranged biomass cotton fiber template, which was absorbed with aluminum resource. Thermal conductivity of the AlN/C-loaded epoxy composites with anisotropic thermal conductivity was greatly increased at a low filler load. The composite shows a high thermal conductivity of 0.49 W m-1 K-1 along the axial direction at a filler load of 12.4 wt%, which is 3.27 times of the pure epoxy resin, and also boasts a thermal conductivity of 0.33 W m-1K-1 along the lateral direction. This work provides a new idea for developing high-efficient thermal management with anisotropic design.

» Author: Zihe Chen, Chengzhi Zhao, Weijia Meng, Nan Sheng, Chunyu Zhu, Zhonghao Rao

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737


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