The mechanical response and microscopic deformation mechanism of graphene foams tuned by long carbon nanotubes and short crosslinkers

doi:10.1039/d2cp04221e

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

	The mechanical response and microscopic deformation mechanism of graphene foams tuned by long carbon nanotubes and short crosslinkers
	Wang, Shuai 3; Yang, Tian 1,2; Wang, Chao 1,2; Liang, Lihong 3
刊名	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
	2022-11-28
页码	11
ISSN号	1463-9076
DOI	10.1039/d2cp04221e
通讯作者	Wang, Chao(wangchao@lnm.imech.ac.cn) ; Liang, Lihong(lianglh@mail.buct.edu.cn)
英文摘要	The mechanical response of graphene foams (GrFs) can be enhanced by both short crosslinkers (e.g. C-C bond) and long carbon nanotubes (CNTs) in experiments; however, the underlying mechanism is still unclear. Here, a coarse-grained molecular dynamics method is used to study the mechanical response and microscopic mechanism of GrF interconnected by both short crosslinkers and long CNTs (named CNT bonded GrF, CbGrF) under tension and compression, and the effect of the properties of graphene and CNTs on the mechanical properties of CbGrF is also investigated. Compared with short bonds, long CNTs play a reinforcing role at a larger tensile strain, leading to larger tensile strength and toughness. Under compression, the sliding and rotation of graphene sheets in CbGrF are prevented by long CNTs, resulting in higher compressive stiffness than that of pure GrFs. Furthermore, the tensile and compressive moduli increase by more than 300% with increasing thickness of graphene sheets from 1 to 9 layers; they increase by no more than 50% as the CNT bending stiffness increases and are almost independent of the stretching stiffness of CNTs. These results should be helpful for understanding the tunability of GrFs using both short and long crosslinkers and guiding the preparation of advanced GrF-based composites.
资助项目	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Fundamental Research Funds for the Central Universities of China ; [12002034] ; [11972348] ; [12172035] ; [92160203] ; [XDB22040503] ; [buctrc201930]
WOS关键词	SUPER-ELASTICITY ; ENERGY-STORAGE ; AEROGELS ; OXIDE ; PERFORMANCE ; CONVERSION ; STRENGTH
WOS研究方向	Chemistry ; Physics
语种	英语
WOS记录号	WOS:000894600100001
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Fundamental Research Funds for the Central Universities of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91198]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wang, Chao; Liang, Lihong
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China 3.Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shuai,Yang, Tian,Wang, Chao,et al. The mechanical response and microscopic deformation mechanism of graphene foams tuned by long carbon nanotubes and short crosslinkers[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2022:11.
APA	Wang, Shuai,Yang, Tian,Wang, Chao,&Liang, Lihong.(2022).The mechanical response and microscopic deformation mechanism of graphene foams tuned by long carbon nanotubes and short crosslinkers.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,11.
MLA	Wang, Shuai,et al."The mechanical response and microscopic deformation mechanism of graphene foams tuned by long carbon nanotubes and short crosslinkers".PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2022):11.