连续铝纤维制备尼龙6导热复合材料  

Thermally Conductive Composite Material of Nylon 6 Prepared with Continuous Aluminum Fibers

作　　者：张宁[1,2] 郭强[1] 石文鹏[2] 徐应林[2] 许昆鹏[2] 董奇伟[2] 潘书刚[2] 

机构地区：[1]上海大学材料科学与工程系,上海200072 [2]常州轻工职业技术学院轻工工程系,江苏常州213164

出　　处：《高分子材料科学与工程》2016年第4期159-162,167,共5页Polymer Materials Science & Engineering

摘　　要：以连续铝纤维为导热填料、尼龙6(PA6)为基体,采用挤出造粒,制备低填充、高导热、力学性能优良的导热尼龙复合材料。研究了铝纤维用量、直径、长度,与氧化铝(Al2O3)粉末复配、表面处理等因素对导热性能的影响,分析了微观结构。结果表明,铝纤维用量较高,铝纤维长度越长,复合材料导热性能越好;铝纤维用量低于4%时,改性效果8μm>12μm>16μm;铝纤维用量大于4%时,改性效果16μm>12μm>8μm;氧化铝与铝纤维无法起到协同作用,反而导致材料导热性能下降;γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)对铝纤维表面处理可以提高材料的导热性能。当铝纤维用量为10%,长度为10 mm,表面处理后,复合材料导热系数可达1.85 W/(m·K)。Nylon composite materials with excellent characteristics of low filled,great thermal conductivity and mechanical properties were prepared by extrusion granulation. Continuous aluminum fibers was thermally conductive filler,and nylon 6（ PA6） was matrix. The effects of aluminum fiber mass fraction,diameter,length,and alumina（ Al2O3）powder compound,surface treatment and other factors on thermal conductivity were studied. And microstructure was analyzed. The results show that the higher the mass fraction of aluminum fiber,the longer length of aluminum fiber,the better the thermal conductivity of composite materials; when the mass fraction of alumina fiber is less than 4%,the modification effect is 8 μm〉 12 μm 〉16 μm; when the mass fraction of alumina fiber is more than 4%,the modification effect is 16 μm 〉12 μm 〉8 μm; alumina and aluminum fibers cannot play a synergistic effect,but lead to thermal degradation; aluminum fiber surface treated with γ-glycidoxypropyl trimethoxysilane（ KH560） can improve the thermal conductivity of the materials. When aluminum fiber mass fraction is 10% and the length is 10 mm,surface treated with KH560,the thermal conductivity of composite can rise up to 1. 85 W /（ m·K）.

关 键 词：导热复合材料 连续铝纤维 导热尼龙 导热性能 表面处理 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]