采用十六烷基三甲基溴化铵改性的氮化硼微粒(BN-CTAB)填充双马来酰亚胺-三嗪树脂(BT树脂)制备了BT/BN-CTAB导热绝缘复合材料。研究了改性氮化硼对BT树脂复合材料导热性能、热稳定性能和电绝缘性能的影响。结果表明,随着改性氮化硼的加入,复合材料热导率随之逐渐上升,体积电阻率略有下降,当加入15%改性氮化硼时,复合材料的热导率达到0.63W/(m·K),比BT树脂的热导率提高了186%,而该复合材料仍能保持优异的绝缘性能。改性氮化硼的加入有助于提高BT树脂复合材料的热稳定性,当氮化硼的含量为15%时,复合材料的热分解温度(失重5%时)较纯BT树脂材料提高了55.1℃。
Thermally conductive and electric-insulating bismalimides-triazine (BT) resin composites filled with boron nitride (BN) modified by hexadecyltrimethylammonium bromide were prepared.The effects of modified BN on the thermal conductivity,thermal stability and electric-insulating properties of composites were investigated.The results indicated that the thermal conductivity of BT composites increased gradually with addition of modified BN,while the volume resistivity decreased slightly.With 15% modified BN loading,the thermal conductivity enhanced to 0.63W/m·K,which was 186% higher than that of the neat BT resin.Meanwhile,the composite retained excellent electric-insulating property.The addition of modified boron nitride was propitious to improve thermal stability of BT composites.When BN content was 15%,the thermal decomposition temperature of composite (5% loss weight) was 55.1℃ which was higher than that of pure BT resin.
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基金资助
江苏省高校自然科学研究项目(16KJB430034);江苏省“333工程”科研项目(BRA2017344);软化学与功能材料教育部重点实验室开放基金(30916014103)
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