摘要
为探讨影响导热复合材料性能的关键,以片状六方氮化硼(H-BN)和球形氧化铝(Al_(2)O_(3))为填料,使用三辊开炼机共混制备环氧树脂(EP)基导热绝缘复合材料,选择鳞片石墨为对比实验的填料,制备非绝缘导热复合材料。研究填料种类和质量分数对复合材料导热性能、力学性能、介电性能、电阻率和热稳定性等的影响。结果表明:填料的加入能够显著提高复合材料的导热性能,当复配填料总量为120份(以每100 g计)时,H-BN和Al_(2)O_(3)质量比为8∶2时,复合材料的导热系数达0.899 W/(m·K),是纯EP的4.2倍。除对比组外,复合材料均具有较好介电性能、电阻率和热稳定性,是良好的绝缘材料。
To investigate the critical factors to influence the properties of composites,thermal conductive and electrical insulating epoxy resin(EP)composites were prepared by blending platelet H-BN and spherical Al_(2)O_(3) in the polymer matrix through a three roll mixing mill.Non-insulating thermal conductive EP composites were prepared by blending flake graphite in the polymer matrix as comparative experiment.The effects of filler content on thermal conductivity,mechanical properties,electric-insulation and thermal stability properties of EP composite were investigated.The results indicated that blending filler in the polymer matrix gave the composites higher thermal conductivity.When the total filler content is 120 Phr and the mass ratio of H-BN/Al_(2)O_(3) is 8∶2,the thermal conductivity of the composites reached 0.899 W/(m·K),which is 4.2 times higher than that of the neat EP.Meanwhile,the composites retained excellent dielectric properties,higher resistivity and thermal stability.The polymer matrix was excellent electrical insulating composites.
作者
刘升华
LIU Sheng-hua(NO.92941 PLA,Huludao 125000,Liaoning Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2022年第7期22-26,共5页
Chemical Engineering(China)
关键词
导热性能
环氧树脂
填充型
复合材料
thermal conductivity
epoxy resin
filling
polymer composite
