Graphene Foam: Hole-Flake Network for Uniaxial Supercompression and Recovery Behavior

doi:10.1021/acsnano.8b06558

IMECH-IR > 非线性力学国家重点实验室

	Graphene Foam: Hole-Flake Network for Uniaxial Supercompression and Recovery Behavior
	Pan DX(潘斗兴)1,2 ; Wang C(王超)2 ; Wang XJ 1
通讯作者	Pan, Douxing(pandx@lnm.imech.ac.cn) ; Wang, Xiaojie(xjwang@iamt.ac.cn)
发表期刊	ACS NANO
	2018-11-01
卷号	12 期号:11 页码:11491-11502
ISSN	1936-0851
摘要	We employed the coarse-grained molecular dynamics simulation method to systematically study the uniaxial supercompression and recovery behavior of multi porous graphene foam, in which a mesoscopic three-dimensional network with hole-graphene flakes was proposed. The network model not only considers the physical cross-links and interlayer van der Waals interactions, but also introduces a hole in the flake to approach the imperfection of pristine graphene and the hierarchical porous configuration of real foam material. We first recreated a typical two-stage supercompression stress strain relationship and the corresponding time-dependent recovery as well as a U-type nominal Poisson ratio. Then the recovery unloading at different strains and multicycle compression-uncompression were both conducted; the initial elastic moduli in the multicycles were found to be the same, and a multilevel residual strain was disclosed. Importantly, the residual strain is not exactly the plastic one, part of which can resurrect in the subsequent loading-unloading-holding. The mesoscopic mechanism of viscoelastic and residual deformation for the recovery can be attributed to the van der Waals repulsion and mechanical interlocking among the hole-flakes; interestingly, the local tensile stress was observed in the virial stress distribution. Particularly, an abnormal turning point in the length-time curve for the mean bead-bond length was captured during the supercompression. After the point, the length abnormally increases for different size ratios of the hole to the flake, which is in line with the mesostructure evolution. The finding may provide a mesoscopic criterion for the supercompression of graphene foam related materials.
关键词	coarse-grained molecular dynamics graphene foam supercompression recovery behavior strain history mesoscale van der Waals interaction viscoelastoplasticity
DOI	10.1021/acsnano.8b06558
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000451789200088
关键词[WOS]	3D ; DEFORMATION ; AEROGELS ; POLYMER ; PERFORMANCE ; MECHANICS ; DYNAMICS ; STRENGTH
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
资助项目	National Natural Science Foundation for the Youth (NSFY) of China[11802306] ; National Natural Science Foundation for the General Program (NSFG) of China[11572320] ; Chongqing City Basic and Frontier Research Project[cstc2015jcyjBX0135]
项目资助者	National Natural Science Foundation for the Youth (NSFY) of China ; National Natural Science Foundation for the General Program (NSFG) of China ; Chongqing City Basic and Frontier Research Project
论文分区	一类
力学所作者排名	1
RpAuthor	Pan, Douxing ; Wang, Xiaojie
引用统计	被引频次：22[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/311007/78970
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Adv Mfg Technol, Bioinspired Robot & Intelligent Mat Lab, Changzhou 213164, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Pan DX,Wang C,Wang XJ. Graphene Foam: Hole-Flake Network for Uniaxial Supercompression and Recovery Behavior[J]. ACS NANO,2018,12,11,:11491-11502.
APA	潘斗兴,王超,&Wang XJ.(2018).Graphene Foam: Hole-Flake Network for Uniaxial Supercompression and Recovery Behavior.ACS NANO,12(11),11491-11502.
MLA	潘斗兴,et al."Graphene Foam: Hole-Flake Network for Uniaxial Supercompression and Recovery Behavior".ACS NANO 12.11(2018):11491-11502.

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