连续铝纤维制备尼龙6导热复合材料

发布时间：2018-11-12 09:04

【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8μm12μm16μm;铝纤维用量大于4%时,改性效果16μm12μm8μm;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)。
[Abstract]:The thermal conductive nylon composites with low filling, high thermal conductivity and excellent mechanical properties were prepared by extrusion granulation with continuous aluminum fiber as thermal conductive filler and nylon 6 (PA6) as matrix. The effects of the amount of aluminum fiber, diameter, length, mixing with alumina (Al2O3) powder and surface treatment on the thermal conductivity were studied. The microstructure was analyzed. The results show that the higher the amount of aluminum fiber is and the longer the length of aluminum fiber is, the better the thermal conductivity of the composite is, when the amount of aluminum fiber is lower than 4, the modification effect is 8 渭 m ~ 12 渭 m ~ (16) 渭 m, and the modification effect is 16 渭 m ~ (12) 渭 m ~ (8 渭 m) when the amount of aluminum fiber is more than 4 渭 m. The thermal conductivity of aluminum fiber can be improved by the surface treatment of 纬 -glycidyl ether propyl trimethoxy silane (KH560). The thermal conductivity of the composite can reach 1.85 W / (m K). When the amount of aluminum fiber is 10 and the length is 10 mm,.
【作者单位】： 上海大学材料科学与工程系;常州轻工职业技术学院轻工工程系;
【分类号】：TB33
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本文编号：2326668