A Raman spectroscopic investigation of heating effects and the deformation behaviour of epoxy/SWNT composites
A Raman spectroscopic investigation of heating effects and the deformation behaviour of epoxy/SWNT composites
复制标题
DOI：
10.1016/j.compscitech.2004.01.019
复制
发表时间：
2004-11
影响因子：
9.1
通讯作者：
C. Kao;R. Young
中科院分区：
文献类型：
--
作者：
C. Kao;R. Young
利用拉曼光谱研究了单壁碳纳米管（SWNT）增强环氧树脂复合材料的变形行为及其热效应。结果表明，由于激光束的加热效应，单壁碳纳米管和单壁碳纳米管/环氧复合材料的拉曼G′带随着入射激光束强度的增加而向低波数方向移动。含0.1%单壁碳纳米管的环氧树脂/单壁碳纳米管复合材料的G′带在四点弯曲变形过程中也发生了位移，压缩时G ′带向高波数方向移动，拉伸时G ′带向低波数方向移动。在高应变（>±0.5%）下，由于界面失效和纳米管屈曲（在压缩中），位移在拉伸和压缩两者中达到平台水平。结果还表明，复合材料中的单壁碳纳米管的变形行为随树脂固化温度的变化，可能是由于残余应力的存在。
Raman spectroscopy has been used to characterise the deformation behaviour of single-walled carbon nanotube (SWNT) reinforced epoxy resin composites and associated heating effects. It has been found that the Raman G′band of the SWNTs shifts to lower wavenumber as the intensity of the incident laser beam is increased for both the as-received SWNTs and the SWNT/epoxy composite, due to laser beam heating effects. The G′band of epoxy/SWNT composites containing 0.1% of SWNTs was also found to shift, during deformation under four-point bending, to higher wavenumber in compression and to lower wavenumber in tension. At high strains (>±0.5%) the shifts reach plateau levels in both tension and compression due possibly to interfacial failure and nanotube buckling (in compression). It was also shown that the deformation behaviour of the SWNTs in composites varies with the resin curing temperature due probably to the presence of residual stresses.