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首页> 外文期刊>Journal of Applied Polymer Science >Matching micro- and nano-boron nitride hybrid fillers for high-thermal conductive composites
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Matching micro- and nano-boron nitride hybrid fillers for high-thermal conductive composites

机译：用于高导热复合材料的匹配微硼和纳米氮化物杂交填料

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摘要

Incorporating hybrid fillers into polymer has been considered as one of the effective ways to obtain composites with high-thermal conductivities (TCs). Herein, we fabricated polytetrafluoroethylene (PTFE) composites by using micro-boron nitride nanosheets (mBNNs) and nano-BNNs (nBNNs) as fillers, and studied the optimum ratios of mBNNs to nBNNs (i.e., mBNNs:nBNNs) for obtaining high-thermal conductive composites at different filler's contents. The results indicated that for the composites with total BNNs contents of 10, 20, and 30 wt%, the optimum mBNNs:nBNNs for obtaining the highest TC were 9:1, 9:1, and 5:5, respectively. The highest TC of the composites with 30 wt% BNNs could reach 1.46 W center dot m(-1)center dot K-1, which was 356% higher than that of PTFE. The reasons for optimum mBNNs:nBNNs values were interpreted by observing the composite's microstructures. Moreover, the fabricated composites also exhibited excellent electrical insulation properties. This study has important implications for obtaining high-thermal conductive composites using hybrid fillers.
机译：在聚合物中加入杂化填料被认为是获得高导热复合材料的有效途径之一。本文以微氮化硼纳米片（mBNNs）和纳米氮化硼纳米片（nBNNs）为填料，制备了聚四氟乙烯（PTFE）复合材料，并研究了不同填料含量下mBNNs与nBNNs（即mBNNs:nBNNs）的最佳配比，以获得高导热复合材料。结果表明，对于总BNN含量为10%、20%和30%的复合材料，获得最高TC的最佳mBNNs:nBNNs分别为9:1、9:1和5:5。BNNs含量为30wt%的复合材料的最高TC可达1.46w中心点m（-1）中心点K-1，比PTFE高356%。最佳mBNNs值的原因是通过观察复合材料的微观结构来解释的。此外，所制备的复合材料还表现出优异的电绝缘性能。这项研究对使用杂化填料制备高导热复合材料具有重要意义。

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