Abstract
With the development of integrated circuits and the miniaturization/ integration of electronic devices, heat dissipation solutions have become an increasingly important issue. The thermal conductivity of polymer-based thermal management materials is typically influenced by the amount of incorporated fillers. However, an innovative solution to increase the thermal conductivity without increasing the total filler content is the improvement of the filler connectivity by using specific surface modifications. Surface modifications using thermal conductive submicron particles can reduce the interfiller distances, acting as thermal bridges between the particles. In this paper, copper submicron particles modified BN (BN@CuSMPs) have been prepared by in situ reduction and mixed with graphene oxide (GO). A three-dimensional BN@CuSMPs/rGO aerogel (CBGA) framework with "point-surface" connection has been prepared by using the self-assembly mode of GO. CBGA/EP composites were then prepared using epoxy resin (EP) as matrix and a vacuum assisted impregnation method. The thermal conductivity of CBGA/EP composites has been found to be 1.918 W m−1 K−1 using a filler content of 19.61%, which was 12.8% higher than that of BN/rGO/EP composites and 909.5% higher than that of pure EP. The thermal resistance of the composites was analyzed using the Foygel model. It was found that the introduction of CuSMPs effectively decreased the thermal resistance between the BN particles, forming a thermal conductive three dimensional network inside the polymer-based material system.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The work was funded by the Chinese German Centre for the Promotion of Science via the National Natural Science Foundation of China (NSFC) and Deutsche Forschungsgemeinschaft (DFG) under [grant number GZ1448] and by National Government Guided Special Funds for Local Science and Technology Development (Shenzhen, China) (No. 2021Szvup041).
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Highlights
Copper submicron particles were introduced on BN surface and prepared into three dimensional thermal conduction skeleton network.
The decrease of contact thermal resistance is the main factor to improve the thermal conductivity of composites.
The composite materials prepared in this study have both high thermal conductivity and high insulation properties.
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Li, S., Wu, W., Drummer, D. et al. Copper Modified Boron Nitride And Graphene Combined To Self-Assemble Three-Dimensional Thermal Conductivity Framework to Improve the Thermal Conductivity of Epoxy Resin. Appl Compos Mater 31, 897–910 (2024). https://doi.org/10.1007/s10443-023-10195-9
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DOI: https://doi.org/10.1007/s10443-023-10195-9