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首页> 美国卫生研究院文献>Nanomaterials >Graphene−Perfluoroalkoxy Nanocomposite with High Through-Plane Thermal Conductivity Fabricated by Hot-Pressing
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Graphene−Perfluoroalkoxy Nanocomposite with High Through-Plane Thermal Conductivity Fabricated by Hot-Pressing

机译：石墨烯-全氟烷氧基纳米复合材料的热压高贯穿平面热导率

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摘要

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.
机译：随着电子设备和便携式设备的飞速发展，迫切需要具有高通透热导率（TC）的聚合物纳米复合材料。在这项工作中，我们通过热压然后机械加工制造了具有高通板TC的石墨烯纳米片-全氟烷氧基（GNs-PFA）复合片。当GNs的含量超过10 wt％时，GNs在PFA基质中垂直排列，纳米复合材料的平面TCs比其平面TC高10-15倍。特别地，具有30wt％的GNs的复合材料表现出25.57W /（m·K）的通面TC，这比纯PFA的通面TC高9700％。将具有30 wt％GNs的复合材料附着到大功率发光二极管（LED）的表面，以评估其散热能力。与纯PFA相比，具有垂直排列的GN的复合材料将LED表面温度降低了约16°C。我们简便，低成本的方法可大规模生产具有高通板TC的GNs-PFA纳米复合材料，可用于各种热管理应用中。

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