Super-compressible foamlike carbon nanotube films
Super-compressible foamlike carbon nanotube films
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DOI：
10.1126/science.1118957
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发表时间：
2005-11-25
期刊：
影响因子：
56.9
通讯作者：
Ajayan, PM
中科院分区：
文献类型：
--
作者：
Cao, AY;Dickrell, PL;Ajayan, PM
我们报道了垂直排列的碳纳米管的独立膜表现出超可压缩的泡沫状行为。在压缩下，纳米管共同形成锯齿形的波纹，可以在负载释放时完全展开到其原始长度。与传统的低密度柔性泡沫相比，纳米管膜显示出更高的压缩强度、恢复率和下垂因子，并且纳米管阵列的开孔性质提供了优异的透气性。纳米管薄膜呈现一类开孔泡沫结构，由排列良好的一维单元（纳米管支柱）组成。轻质、高弹性的纳米管膜可用作顺应性和能量吸收涂层。
We report that freestanding films of vertically aligned carbon nanotubes exhibit super-compressible foamlike behavior. Under compression, the nanotubes collectively form zigzag buckles that can fully unfold to their original length upon load release. Compared with conventional low-density flexible foams, the nanotube films show much higher compressive strength, recovery rate, and sag factor, and the open-cell nature of the nanotube arrays gives excellent breathability. The nanotube films present a class of open-cell foam structures, consisting of well-arranged one-dimensional units (nanotube struts). The lightweight, highly resilient nanotube films may be useful as compliant and energy-absorbing coatings.