The realignment of carbon nanotubes in polymer/CNT composites by mechanical stretching method

doi:10.1117/12.780321

CORC > 兰州理工大学 > 兰州理工大学 > 理学院

	The realignment of carbon nanotubes in polymer/CNT composites by mechanical stretching method
	Dai, Jianfeng; Wang, Qing; Li, Weixue; Wei, Zhiqiang; Jiang, Jinlong
	2007
会议日期	July 1, 2007 - July 4, 2007
会议地点	Harbin, China
关键词	Composite materials Elastic moduli Epoxy resins Scanning electron microscopy Stretching Torque Angular displacement Mechanical stretching method Reinforced polymer composites
卷号	6423
DOI	10.1117/12.780321
英文摘要	A new convenient and simple technique for the realignment of carbon nanotubes in single walled carbon nanotubes (SWNTs) reinforced polymer composites by stretching the semidried matrices in the same direction repeatedly is presented in this paper. Every SWNT in the matrices having an angular displacement tend to align in the stretching direction due to a torque exerting on it. Only when SWNT aligned along the stretching direction, the torque equal zero. CNT/polymer composites SWNT/epoxy resin and SWNT/PMMA were prepared by solution casting and in situ polymerization respectively. SEM demonstrates that SWNTs are well dispersed in the composite matrix and aligning in the stretching direction. The electrical and mechanical tests indicate that the composites prepared by this method present highly anisotropic properties. The mechanical properties of composites rise with the increase of SWNT concentration, composites showed higher mechanical properties such as the Young's modulus, tensile strength and elongation along the stretched direction than perpendicular to it. A sharp increase of the conductivity value was observed for both SWNT/epoxy and SWNT/PMMA composites just with low SWNT weight fractions. With respect to pure PMMA, the electrical conductivity of 3 wt. % aligned SWNT nanocomposite increased by 9 orders of magnitude, up to 10-3 S/cm.
会议录	Proceedings of SPIE - The International Society for Optical Engineering
会议录出版者	SPIE, P.O. Box 10, Bellingham WA, WA 98227-0010, United States
语种	英语
ISSN号	0277786X
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/117027]
专题	理学院
作者单位	Lanzhou Univ. of Technology, China
推荐引用方式 GB/T 7714	Dai, Jianfeng,Wang, Qing,Li, Weixue,et al. The realignment of carbon nanotubes in polymer/CNT composites by mechanical stretching method[C]. 见:. Harbin, China. July 1, 2007 - July 4, 2007.