奈米碳管/聚對苯二甲酸乙二酯複合材料之合成及特性研究

Synthesis and Characterization of Carbon Nanotubes/PET Composite

何君德(Chun-Te Ho)

指導教授 ： 林鴻明

大同大學/工程學院/材料工程學系所/碩士(2009年)

摘要

本研究將奈米碳管與傳統的紡織纖維結合，進而開發出具有高附加價值性的導電型奈米碳管纖維材料。
奈米碳管是目前人類已知最細的管子，不論在物性、化性或材料的特性上均有顯著非凡的表現，它具有高導熱性、高強度、良導電性、柔軟度高及化性穩定等特點。本研究針對奈米碳管進行不同條件的酸洗，藉以純化並控制奈米碳管的結構與特性，於高分子化製程時將純化的碳管練入反應前驅物中，製成奈米碳管混成之機能高分子複合材料。此混成複合材料具有碳管之高導熱、良導電、高強度及高柔軟度的特性。若再藉由電源聯結，更可成為加熱式紡織纖維，能增加其在衣著、家飾、產業紡織品的利用價值。
實驗的結果顯示，奈米複合材料的導電率會隨著奈米碳管添加在聚乙烯對苯二甲酸酯(PET)中的量增加而提升。當奈米碳管添加量達到4重量百分比時，複合材料具有較高的導電率及EMI遮蔽效果。若比較添加有、無酸洗處理奈米碳管的複合材料，發現添加酸洗處理奈米碳管之複合材料並沒有較佳的電性及EMI遮蔽效果，其原因可能是奈米碳管在酸洗處理後產生團聚所致。

關鍵字

纖維 ； 導電 ； 聚對苯二甲酸乙二酯 ； 奈米碳管 ； 複合材料

並列摘要

The purpose of this study is combining multi-walled carbon nanotubes with the traditional fibers to develop the high added value of conductive fibers.
Carbon nanotubes are the thinnest tubes people ever know. Besides the properties on physical and chemical, they also have outstanding performances with high thermal conductivity, high strength, good electrical conductivity, high flexibility, and chemical stability. This study will use with or without purified carbon nanotubes and introduce them into the fibers with different concentrations. The carbon nanotubes polymer composite as new functional fibers are developed to examine its structures and properties. The fibers contain the properties of carbon nanotubes such as high thermal conductivity, high strength, good electrical conductivity, and high flexibility. With connecting to the power supply, it can be used as thermal textile fibers, which can add on the value of fibers in the applications of clothing, decoration, and textile products.
According to the results in this study, the conductivities of nanocomposites increase with the amounts of MWCNTs added in PET. MWCNTs/PET nanocomposite with 4wt.% MWCNTs has higher electrical conductivity, and better capable of electromagnetic shielding. The results also indicates the MWCNTs/PET with 3 wt.% purified MWCNTs doesn’t show better performance than that of 3 wt.% as-prepared MWCNTs/PET, which may due to the aggregation of MWCNTs during acid treatment.

並列關鍵字

fiber ； electric conductive ； PET ； MWCNTs ； composite material

參考文獻

[1] Staudinger, H., Ber. 53, (1920) 1073.

[2] Staudinger, H. and J. Fritsch, Helv. Chim. Acta 5, (1922) 778.

[3] Morawetz, H., Polymer: The Origins and Growth of a Science, Wiley-Interscience, New York, 1985.

[5] P.BAHADUR N.V. SASTRY, Principles of Polymer Science, 2-8.

[6] Stephen L.ROSEN, Fundamental Principles of Polymeric Materials Second Editor, Willy-Interscience Publication, 121.