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Open AccessArticle

Graphene−Perfluoroalkoxy Nanocomposite with High Through-Plane Thermal Conductivity Fabricated by Hot-Pressing

1
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
Beijing Engineering Research Center of Energy Saving and Environmental Protection, University of Science and Technology Beijing, Beijing 100083, China
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Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China
4
China Energy Conservation and Environmental Protection Group, Beijing 100082, China
5
China Energy Conservation and Environmental Protection Group National Machinery United Electric Power (Ningxia) Co., Ltd., Yinchuan 750011, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(9), 1320; https://doi.org/10.3390/nano9091320
Received: 1 August 2019 / Revised: 25 August 2019 / Accepted: 4 September 2019 / Published: 15 September 2019
With the rapid development of electronics and portable devices, polymer nanocomposites with high through-plane thermal conductivity (TC) are urgently needed. In this work, we fabricated graphene nanosheets−perfluoroalkoxy (GNs−PFA) composite sheets with high through-plane TCs via hot-pressing followed by mechanical machining. When the GNs content exceeded 10 wt%, GNs were vertically aligned in the PFA matrix, and the through-plane TCs of nanocomposites were 10–15 times higher than their in-plane TCs. In particular, the composite with 30 wt% GNs exhibited a through-plane TC of 25.57 W/(m·K), which was 9700% higher than that of pure PFA. The composite with 30 wt% GNs was attached to the surface of a high-power light-emitting diode (LED) to assess its heat-dissipation capability. The composite with vertically aligned GNs lowered the LED surface temperature by approximately 16 °C compared with pure PFA. Our facile, low-cost method allows for the large-scale production of GNs–PFA nanocomposites with high through-plane TCs, which can be used in various thermal-management applications. View Full-Text
Keywords: thermal conductivity; nanocomposite; graphene; alignment; hot-pressing; perfluoroalkoxy thermal conductivity; nanocomposite; graphene; alignment; hot-pressing; perfluoroalkoxy
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MDPI and ACS Style

Zhang, X.; Xie, X.; Cai, X.; Jiang, Z.; Gao, T.; Ren, Y.; Hu, J.; Zhang, X. Graphene−Perfluoroalkoxy Nanocomposite with High Through-Plane Thermal Conductivity Fabricated by Hot-Pressing. Nanomaterials 2019, 9, 1320.

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