摘要
采用浇铸成型法制备碳化硅/环氧树脂(SiC/EP)导热复合材料,研究了SiC种类、粒径、用量和表面改性方法对SiC/EP复合材料的导热性能、力学性能和热性能等影响。结果表明:SiC/EP复合材料的导热系数随纳米级SiC用量增加而增大,当φ(纳米级SiC)=17.80%时,导热系数为0.954 6 W/(m.K);SiC/EP复合材料的弯曲强度和冲击强度随纳米级SiC用量增加均呈先升后降态势,当φ(纳米级SiC)=3.50%时,两者均达到最大值。SiC经表面改性后可有效提高复合材料的导热性能和力学性能,并且改性SiC的加入可有效降低EP的玻璃化转变温度。
A SiC/EP(epoxy resin) thermal conductivity composite was prepared by casting moulding method.The influences of some factors(such as types,size,volume fraction and surface modified methods of SiC) were investigated on the thermal conductivity,mechanical property and thermal property of SiC/EP composite.The results showed that the thermal conductivity,which was increased with increasing nano-SiC contents,was 0.954 6 W/(m·K) when volume fraction of nano-SiC was 17.80% for SiC/EP composite.The bend strength and impact strength,which had rise-drop trend with increasing nano-SiC contents,had maximal when volume fraction of nano-SiC was 3.50% for SiC/EP composite.The SiC treated by surface modified can availably improve thermal conductivity and mechanical property of SiC/EP composite,and the glass transition temperature of EP can be availably decreased when modified nano-SiC was introduced into systems.
出处
《中国胶粘剂》
CAS
北大核心
2010年第12期18-22,共5页
China Adhesives
基金
国家自然基金项目(50773063)
关键词
环氧树脂
碳化硅
导热性
复合材料
表面改性
epoxy resin(EP)
SiC
thermal conductivity
composite
surface modified