High-performance carbon nanotube fiber
High-performance carbon nanotube fiber
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DOI：
10.1126/science.1147635
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发表时间：
2007-12-21
期刊：
影响因子：
56.9
通讯作者：
Windle, Alan
中科院分区：
文献类型：
--
作者：
Koziol, Krzysztof;Vilatela, Juan;Windle, Alan
碳纳米管具有令人印象深刻的特性，应该可以形成高性能的纤维。我们探讨了纳米管的长度和结构、纤维密度和纳米管取向在获得最佳力学性能中的作用。我们发现碳纳米管纤维从气相直接连续纺成气凝胶，结合了高强度和高刚度（轴向弹性模量），具有比任何商业高强度纤维大得多的断裂能量（韧性）。通过以不同的缠绕速率拉伸气凝胶，可以获得不同水平的碳纳米管取向、纤维密度和机械性能。获得的力学数据表明，碳纳米管组件在追求最大力学性能方面具有相当大的潜力。力学数据的统计方面揭示了缺陷的有害影响，并指出了未来工作的策略。
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.