各向异性堆叠结构环氧树脂复合材料的热防护性能

Anisotropic stacked epoxy composites with excellent thermal properties

基于导热-隔热原理,通过在环氧树脂(Epon)中添加质量分数为5%,15%,25%的六方氮化硼(h-BN)作为填料制备环氧基散热层,质量分数为1%的膨胀蛭石(E-ver)作为填料制备环氧基隔热层,设计了宏观交替堆叠的环氧复合材料,并进行了热防护性能的研究。研究结果表明:具有各向异性结构的复合材料,顶部中心温度较传统材料的温度下降13~16℃,热延迟时间大大提升,并随着h-BN含量的增加,热性能得到明显改善。理论分析了该堆叠结构下复合材料"横向散热、纵向抑热"的机理。

With the rapid development of high-power lasers and electronic technology, higher requirements have been proposed for the structure and material of the heat sink device. Based on the principle of conductioninsulation heat, alternating stack epoxy resin composites with excellent thermal protection were prepared, the hexagonal boron nitride(h-BN:5%, 15%, 25%) and expanded vermiculite(E-ver: 1%) are used as fillers for heat dissipation layer and thermal insulation layer, respectively. The thermal protection performance experiment was completed. The result shows that the temperature of the top center is 13-16 °C lower than that of the traditional materials, and the thermal delay time is greatly improved. An increase in the h-BN content causes an increase in the thermal protection properties of the composites. The thermal mechanism of the anisotropic stacked composites was explained.