A comparison of the mechanical properties of fibers spun from different carbon nanotubes

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• 作者：Jingjing Jia^a ; Jingna Zhao^b ; Geng Xu^b ; Jiangtao Di^b ; Zhenzhong Yong^b ; Yuyu Tao^b ; Chao Fang^a ; Zuoguang Zhang^a ; Xiaohua Zhang^b ; ^{xhzhang2009@sinano.ac.cn} ; Lianxi Zheng^c ; Qingwen Li^b ; ^{qwli2007@sinano.ac.cn}
• 刊名：Carbon
• 出版年：2011
• 出版时间：April 2011
• 年：2011
• 卷：49
• 期：4
• 页码：1333-1339
• 全文大小：584 K

文摘

Spinnable carbon nanotube (CNT) arrays with different CNT structures have been synthesized using different growth methods and carbon sources, and long and stable fibers have been produced. Parameters of the nanotubes such as tube diameter, wall thickness, tube length and level of defects were found to play a more important role in the mechanical properties of the fibers than did the initial tube arrangement. To improve the fiber strength, as well as the modulus, the tubes must be long and have a small diameter and thin walls. The strongest fiber from double- and triple-walled CNTs is 1.23 GPa in strength, and 32 % and 221 % higher than those from CNTs with 6 and 15 walls (932 and 383 MPa), respectively. The fiber strength can be improved by 25 % , up to 1.54 GPa, after poly(vinyl alcohol) infiltration with volume fraction of 20 % . Our study also shows that C₂H₄ is superior to C₂H₂ as the carbon source for the growth of mainly double- and triple-walled CNTs, and therefore the spinning of high-strength fibers.