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

doi:10.1016/j.carbon.2022.08.042

IMECH-IR > 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)
发表期刊	CARBON
	2022-11
卷号	200 页码:108-115
ISSN	0008-6223
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.
关键词	Carbon nanotube network Friction Crosslink Deformation behavior Coarse -grained molecular dynamics
学科领域	Chemistry, Physical ; Materials Science, Multidisciplinary
DOI	10.1016/j.carbon.2022.08.042
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000855241200002
项目资助者	NSFC [11972348, 11790292] ; Strategic Priority Research Program of the Chinese Acad- emy of Sciences [XDB22040503]
论文分区	一类
力学所作者排名	1
RpAuthor	Wang, C (corresponding author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90149
专题	非线性力学国家重点实验室流固耦合系统力学重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Mech, LMFS, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, 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.

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