Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1863
標題: 奈米碳管/環氧樹酯複合材料熱傳導特性之量測
Measurments on the thermal conductivity of epoxy/carbon-nanotubes composites
作者: 黃暉閔
Huang, Hui-Ming
關鍵字: MWNT;奈米碳管;thermal conductivity;Epoxy;熱傳導係數;環氧樹酯
出版社: 機械工程學系所
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摘要: 
奈米碳管擁有優異的各項物理性質,而本研究著眼於其特別優異的熱傳導性質,多層奈米碳管的熱傳導係數高達3000W/m-K,因此本研究將奈米碳管以化學的方式改質,首先利用羧化(carboxylation)反應的方式讓奈米碳管帶有羧酸基(carboxylic acid groups,-COOH)進而具有水溶性,而後再利用醯化(acylation)反應使奈米碳管帶有醯氯基(acyl chloride,-COCl),因此能溶於高分子末端帶有胺基(amino group,-NH2)的化合物中,使其達到使奈米碳管均勻的分散在環氧樹酯中。而後我們利用熱電偶量測奈米碳管/環氧樹酯複合材料的升溫反應時間(Responding time)以及其熱傳導係數,結果顯示添加了奈米碳管之後,奈米碳管/環氧樹酯複合材料的反應時間(Responding time)提升了約14.3%~26.7%,而熱傳導係數則提升了約15.9%~44.9%。

Carbon nanotubes have many excellent physical properties. This research focuses on investigating the thermal conductivity coefficient of the epoxy with different weight percentage of multi-wall carbon nanotube. We adopt the technique of surface treatment on the MWNT(multiwall-carbon nanotubes) by grafting carboxylic acid to make it soluble in water. Then, the thionyl chloride is prepared to make MWNT disperse uniformly in the epoxy resins. After uniform dispersion, the bulk specimen pieces are made into disk with 50 mm diameter and 4 mm thickness. By employing the thermal couple, we can measure the responding time and the thermal conductivity of the epoxy/carbon-nanotubes composites. The results show that the responding time of the epoxy/carbon-nanotubes composites with 0.3 wt% and 0.5 wt% MWNT increased 14.3%~26.7% relative to that of the pure epoxy. And the thermal conductivity of the epoxy/carbon-nanotubes composites is increase by 15.9%~44.9% the thermal conductivity of pure epoxy. In the present study, the thermal conductivity of this composites material does not vary with temperature for the temperature range studied here in.
URI: http://hdl.handle.net/11455/1863
其他識別: U0005-1904200712164700
Appears in Collections:機械工程學系所

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