碳纳米管
材料科学
复合材料
纳米管
纤维
韧性
破损
刚度
模数
碳纳米管金属基复合材料
气凝胶
弹性模量
纳米技术
化学工程
作者
Krzysztof K. K. Koziol,Juan J. Vilatela,Anna Moisala,Marcelo Ferreira Motta,Philip M. Cunniff,Michael Sennett,Alan H. Windle
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2007-12-21
卷期号:318 (5858): 1892-1895
被引量:866
标识
DOI:10.1126/science.1147635
摘要
With their impressive individual properties, carbon nanotubes should form high-performance fibers. We explored the roles of nanotube length and structure, fiber density, and nanotube orientation in achieving optimum mechanical properties. We found that carbon nanotube fiber, spun directly and continuously from gas phase as an aerogel, combines high strength and high stiffness (axial elastic modulus), with an energy to breakage (toughness) considerably greater than that of any commercial high-strength fiber. Different levels of carbon nanotube orientation, fiber density, and mechanical properties can be achieved by drawing the aerogel at various winding rates. The mechanical data obtained demonstrate the considerable potential of carbon nanotube assemblies in the quest for maximal mechanical performance. The statistical aspects of the mechanical data reveal the deleterious effect of defects and indicate strategies for future work.
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