Mechanical behavior and micro-mechanism of carbon nanotube networks under friction

doi:10.1016/j.carbon.2022.08.042

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Mechanical behavior and micro-mechanism of carbon nanotube networks under friction
	Hu TX(胡天雄); Qian GA(钱桂安); Wu XQ(吴先前); Wang C(王超)
刊名	CARBON
	2022-11
卷号	200 页码:108-115
关键词	Carbon nanotube network Friction Crosslink Deformation behavior Coarse -grained molecular dynamics
ISSN号	0008-6223
DOI	10.1016/j.carbon.2022.08.042
英文摘要	Friction behavior of carbon nanotube networks (CNNs) is ubiquitous in applications, however, is poorly inves-tigated. Here, we employ coarse-grained molecular dynamics (CGMD) simulations to investigate friction be-haviors and microscopic mechanism of CNNs. We first give a phase diagram to determine the initial contacting state of supported or trapped for an indenter in CNNs. In a supported state, friction force is mainly orig-inated from the local surface adhesion of CNNs which experience stable elastic deformation in friction process. In contrast, in a trapped state, friction force is mainly activated by nonlocal reconstitution of carbon nanotubes (CNTs) accompanied with irreversible bond breaking. Furthermore, with an increased normal pressure, the friction force keeps nearly constant for a supported indenter while it increases linearly for a trapped one; the friction force is linearly or nonlinearly related to the sliding velocity of an indenter in a supported or trapped state. Importantly, there is a critical crosslink density, above which, the coefficient of friction is greatly decreased due to enhanced integrity of CNNs. These results provide a profound understanding of friction deformation behavior of CNNs, which is of great significance for optimal design in practical applications.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary
分类号	一类
语种	英语
WOS记录号	WOS:000855241200002
资助机构	NSFC [11972348, 11790292] ; Strategic Priority Research Program of the Chinese Acad- emy of Sciences [XDB22040503]
其他责任者	Wang, C (corresponding author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90149]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, LMFS, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hu TX,Qian GA,Wu XQ,et al. Mechanical behavior and micro-mechanism of carbon nanotube networks under friction[J]. CARBON,2022,200:108-115.
APA	胡天雄,钱桂安,吴先前,&王超.(2022).Mechanical behavior and micro-mechanism of carbon nanotube networks under friction.CARBON,200,108-115.
MLA	胡天雄,et al."Mechanical behavior and micro-mechanism of carbon nanotube networks under friction".CARBON 200(2022):108-115.