摘要
采用熔融共混法制备了Al N/PA6导热复合材料,并深入研究了硅烷偶联剂KH-550含量、导热填料Al N粒径和含量对复合材料导热性能的影响。结果表明,偶联剂对Al N/PA6界面的键合作用以及在Al N表面形成的包覆结构导致了复合材料的热导率随偶联剂含量的增多而先增大后减小。当偶联剂的加入量为1.0wt%时,复合材料的热导率最好,达到0.451 W/(m·K)。Al N粒径大小会影响复合材料的Al N/PA6界面多少和Al N在基体中的分散均匀性,从而影响其导热性能。当Al N粒径为3μm时,热导率最高。随着Al N含量的增多,导热链会逐渐形成,从而使得复合材料的热导率逐渐增大,且增长幅度呈先缓后急的趋势。
AlN/ PA6 thermal conductive composite materials were prepared by melt blending. The impact of the content of the silane coupling agent KH-550, the size and content of the thermally conductive filler AlN on the thermal conductivity of composite material were studied in detail. It showed that the thermal conductivity of the composite material increased with increasing content of coupling agent and then decreased as a result of the bonding effect of coupling agent to AlN/ PA6 interface and coating structure formed on the surface of AlN. When the addition of coupling agent amount was 1. 0wt% , the thermal conductivity of the composite material can reach 0. 451 W/ （m·K）, the result was best. Thermal conduction performance, which was determined by how much of AlN/ PA6 composite interface and AlN uniformity dispersed in matrix, was affected by AlN particle size. When the particle size of the AlN was 3 μm, the thermal conductivity was highest. The thermal conductivity of the composites increased, and the trend of growth rate was slow after a quick first with the increase in the content of AlN, as thermal chain gradually formed.
出处
《广州化工》
CAS
2015年第11期83-84,108,共3页
GuangZhou Chemical Industry
关键词
氧化铝/尼龙6
复合材料
导热性能
热导率
AlN/PA6
composite material
thermal conduction performance
thermal conductivity
