Investigation into the deformation of carbon nanotubes and their composites through the use of Raman spectroscopy
Investigation into the deformation of carbon nanotubes and their composites through the use of Raman spectroscopy
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DOI：
10.1016/s1359-835x(00)00107-x
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发表时间：
2001-01-01
影响因子：
8.7
通讯作者：
Halsall, M
中科院分区：
文献类型：
--
作者：
Cooper, CA;Young, RJ;Halsall, M
利用拉曼光谱研究了单壁碳纳米管（SWNT）和多壁碳纳米管（MWNT）颗粒纳米复合材料的变形微观力学。通过两种不同的方法（脉冲激光和电弧放电）制备的单壁碳纳米管和多壁碳纳米管已被用作聚合物基纳米复合材料的增强体。碳纳米管表现出明确的拉曼峰，并且已使用拉曼光谱来跟踪其变形。单壁碳纳米管在金刚石压砧压力室中用静水压力变形，发现G'峰位置随着静水压力向更高的波数移动。已经发现，对于所有变形的纳米复合材料样品，在施加拉伸应力时，G'拉曼谱带向较低波数移动，表明应力从基质转移到纳米管，因此通过纳米管增强。的行为进行了比较，与高模量碳纤维，并已建模使用取向因子最初建议由考克斯。以这种方式，可以证明分散在复合材料中的SWNT的有效模量可以超过1TPa，MWNT的有效模量可以为约0.3TPa。(C)2001爱思唯尔科技有限公司版权所有。
The deformation micromechanics of single-walled carbon nanotube (SWNT) and multi-walled carbon nanotube (MWNT) particulate nanocomposites has been studied using Raman spectroscopy. SWNTs prepared by two different methods (pulsed-laser and are-discharge) and MWNTs have been used as reinforcement for a polymer matrix nanocomposite. The carbon nanotubes exhibit well-defined Raman peaks and Raman spectroscopy has been used to follow their deformation. SWNTs have been deformed with hydrostatic pressure in a diamond anvil pressure cell and has been found that the G' peak position shifts to a higher wavenumber with hydrostatic compression. It has been found that for all nanocomposites samples deformed, the G' Raman band shifts to a lower wavenumber upon application of a tensile stress indicating stress transfer from the matrix to the nanotubes and hence reinforcement by the nanotubes. The behaviour has been compared with that of high-modulus carbon fibres and has been modelled using orientation factors suggested initially by Cox. In this way it has been possible to demonstrate that the effective modulus of SWNTs dispersed in a composite could be over 1 TPa and that of the MWNTs about 0.3 TPa. (C) 2001 Elsevier Science Ltd. All rights reserved.