Cellulose Nanofiber Supported 3D Interconnected BN Nanosheets for Epoxy Nanocomposites with Ultrahigh Thermal Management Capability
Cellulose Nanofiber Supported 3D Interconnected BN Nanosheets for Epoxy Nanocomposites with Ultrahigh Thermal Management Capability
复制标题
纤维素纳米纤维支持的 3D 互连 BN 纳米片用于具有超高热管理能力的环氧纳米复合材料
DOI：
10.1002/adfm.201604754
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发表时间：
2017-02-01
影响因子：
19
通讯作者：
Jiang, Pingkai
中科院分区：
文献类型：
--
作者：
Chen, Jin;Huang, Xingyi;Jiang, Pingkai
导热但电绝缘的聚合物复合材料因其用途广泛、易于加工和成本低而在热管理应用中非常受欢迎。然而，传统的制备导热聚合物复合材料的方法往往存在导热系数提高较低和/或电绝缘性能恶化的问题。在这项研究中，利用纤维素纳米纤维支撑的三维互联氮化硼纳米片(3D-C-BNNS)气凝胶，报道了一种高导热、电绝缘的环氧纳米复合材料的新方法。当BNNS负载量为9.6%时，纳米复合材料的导热系数提高了约1400%。此外，环氧纳米复合材料仍具有很高的绝缘性，其体积电阻率为1015Ωcm。纳米复合材料在加热和冷却过程中的表面温度随时间的变化表明了其在热管理方面的巨大潜在应用。
Thermally conductive but electrically insulating polymer composites are highly desirable for thermal management applications because of their wide range of utilization, ease of processing, and low cost. However, the traditional approaches to thermally conductive polymer composites usually suffer from the low thermal conductivity enhancement and/or the deterioration of electrical insulating property. In this study, using cellulose nanofiber‐supported 3D interconnected boron nitride nanosheet (3D–C–BNNS) aerogels, a novel method for highly thermally conductive but electrically insulating epoxy nanocomposites is reported. The nanocomposites exhibit thermal conductivity enhancement of about 1400% at a low BNNS loading of 9.6 vol%. In addition, the epoxy nanocomposites are still highly insulating, having a volume electrical resistivity of 1015 Ω cm. The strong potential application for thermal management has been demonstrated by the surface temperature variations of the nanocomposites with time during heating and cooling.