不同粒径氮化硼填充环氧树脂/玻璃纤维绝缘导热复合材料的研究

以聚砜改性环氧树脂为基体,通过高温模压制备了环氧树脂/玻璃纤维/氮化硼复合材料,研究了不同粒径及不同氮化硼导热粒子用量对复合材料导热性能、力学性能和电性能的影响。结果表明,大粒径粒子有利于复合材料力学性能的提高,小粒径有利于导热性能的提高;随着氮化硼用量的增加,复合材料的导热性能升高,力学性能呈现先增后降趋势,当氮化硼用量为10%(质量分数,下同)时,复合材料的冲击强度和弯曲强度均达到最佳,当氮化硼用量为20%时,复合材料仍保持较好的电性能。

EP/GF Insulating and Thermally Conductive Composite Materials Filled with Different Sizes of BN

A thermally conductive composite was prepared using polysulfone modified epoxy resin as a matrix,glass fiber as a reinforcer,and boron nitride(BN) as a thermally conductive filler.It was found that the BN of large particle size could improve the mechanical strength,and those of small particle size was beneficial to a high thermal conductivity.With increasing content of BN particles,the thermal conductivity increased,the impact and flexure strengths increased first,and then decreased.When the content of BN w...