摘要
采用水解法制备核壳结构的AlN@Al2O3,采用硅烷偶联剂KH560对其进行表面修饰,并作为导热填料制备了AlN@Al2O3/环氧树脂复合材料。研究AlN@Al2O3粉体含量对环氧树脂复合材料导热性能、热稳定性及其他性能的影响。结果表明:AlN@Al2O3粉体能够均匀地分散于环氧树脂体系中;随着AlN@Al2O3含量的增加,复合材料的导热性能逐渐提高,当AlN@Al2O3质量分数达到50%时,复合材料的导热系数为1.89 W/(m·K),是纯环氧树脂导热系数的11.1倍,且复合材料在较长的使用时间内仍能保持较好的导热性能;随着AlN@Al2O3含量的增加,复合材料的热分解温度及玻璃化转变温度均呈现出升高的趋势,当AlN@Al2O3质量分数达到50%时,复合材料失重10%时的温度达到最高值398.88℃,玻璃化转变温度达到147.74℃。
An AlN@Al2O3 with core-shell structure was prepared by hydrolysis method,and it was surface-modified with silane coupling agent KH560,then an AlN@Al2O3/epoxy resin composite was prepared using the AlN@Al2O3 as thermal filler.The effects of AlN@Al2O3 powder content on the thermal conductivity,thermal stability,and other performance of the composite were studied.The results show that the AlN@Al2O3 can be dispersed homogeneously in epoxy resin system.With the increase of AlN@Al2O3 content,the thermal conductivity of the composite increases gradually.When the mass fraction of AlN@Al2O3 reaches 50%,the thermal conductivity of the composite is 1.89 W/(m·K),which is 11.2 times higher than that of the pure epoxy resin,and the composite can maintain good thermal conductivity for a long time.With the increase of AlN@Al2O3 content,the thermal decomposition temperature and glass transition temperature of the composite increase.When the mass fraction of AlN@Al2O3 reaches 50%,the 10%decomposition temperature of the composite is 398.88℃,and the glass transition temperature is 147.74℃.
作者
周浩然
袁镇
刘晨
ZHOU Haoran;YUAN Zhen;LIU Chen(School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150000,China)
出处
《绝缘材料》
CAS
北大核心
2020年第8期32-37,共6页
Insulating Materials
基金
黑龙江省自然科学基金项目(LH2019E059)。
关键词
环氧树脂
氮化铝
热氧老化
导热性能
热稳定性
epoxy resin
aluminum nitride
thermo-oxidative ageing
thermal conductivity
thermal stability
