Micro-hardness and flexural properties of randomly-oriented carbon nanotube composites

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	Micro-hardness and flexural properties of randomly-oriented carbon nanotube composites
	K. T. Lau; S. Q. Shi; L. M. Zhou; H. M. Cheng
	2003
发表期刊	Journal of Composite Materials
ISSN	0021-9983
卷号	37 期号:4 页码:365-376
摘要	The carbon nanotubes possess many unique mechanical and electrical properties, and have been appreciated as new advanced materials for nanocomposite structures, particularly for the development of nanocomposite films. Nanotubes may also be used as nano-reinforcements for matrix system for fibre-reinforced plastic structures in order to improve out-of-plane properties, thus increasing the delamination resistance. However, those properties are highly relied on the structural integrity and homogeneity of the nanotube composites. Unfortunately, only a little works have paid much attention on these issues recently. It has been obviously proved that the atomic architecture on the nanotube's surface may be affected after the nanotubes were chemically reacted with polymer matrix. The weak bonding force among the different layers (bonded by a weak Van Der Waals attractive force) of multiwalled nanotubes may also cause a discontinuous stress transfer from the outer-shell to the inner of the composites. This paper reports the micro-hardness and flexural properties of nanotube composites with different amounts of nanotubes content. Experimental measurements and microscopic observations of the nanotube-epoxy composites before and after the tests are discussed in detail. The results show that the hardness of the nanotube composites varied with different nanotube weight fractions. The flexural strength decreased by 10% for a nanotube composite beam with 2 wt. % of nanotubes. The SEM images also revealed that all nanotubes were completely pulled out after the flexural strength test due to a weak-bonding strength between the nanotube and matrix.
部门归属	hong kong polytech univ, dept mech engn, kowloon, hong kong, peoples r china. chinese acad sci, inst met res, shenyang, peoples r china.;lau, kt (reprint author), hong kong polytech univ, dept mech engn, kowloon, hong kong, peoples r china
关键词	Carbon Nanotubes Nanocomposites Hardness Properties Deformation Matrix
URL	查看原文
WOS记录号	WOS:000181613000005
引用统计	被引频次：55[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35878
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. T. Lau,S. Q. Shi,L. M. Zhou,et al. Micro-hardness and flexural properties of randomly-oriented carbon nanotube composites[J]. Journal of Composite Materials,2003,37(4):365-376.
APA	K. T. Lau,S. Q. Shi,L. M. Zhou,&H. M. Cheng.(2003).Micro-hardness and flexural properties of randomly-oriented carbon nanotube composites.Journal of Composite Materials,37(4),365-376.
MLA	K. T. Lau,et al."Micro-hardness and flexural properties of randomly-oriented carbon nanotube composites".Journal of Composite Materials 37.4(2003):365-376.