【摘要】：以連續(xù)鋁纖維為導(dǎo)熱填料、尼龍6(PA6)為基體,采用擠出造粒,制備低填充、高導(dǎo)熱、力學(xué)性能優(yōu)良的導(dǎo)熱尼龍復(fù)合材料。研究了鋁纖維用量、直徑、長度,與氧化鋁(Al2O3)粉末復(fù)配、表面處理等因素對導(dǎo)熱性能的影響,分析了微觀結(jié)構(gòu)。結(jié)果表明,鋁纖維用量較高,鋁纖維長度越長,復(fù)合材料導(dǎo)熱性能越好;鋁纖維用量低于4%時,改性效果8μm12μm16μm;鋁纖維用量大于4%時,改性效果16μm12μm8μm;氧化鋁與鋁纖維無法起到協(xié)同作用,反而導(dǎo)致材料導(dǎo)熱性能下降;γ-縮水甘油醚氧丙基三甲氧基硅烷(KH560)對鋁纖維表面處理可以提高材料的導(dǎo)熱性能。當(dāng)鋁纖維用量為10%,長度為10 mm,表面處理后,復(fù)合材料導(dǎo)熱系數(shù)可達(dá)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 緯 -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,.
【作者單位】： 上海大學(xué)材料科學(xué)與工程系;常州輕工職業(yè)技術(shù)學(xué)院輕工工程系;
【分類號】：TB33
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本文編號：2326668