IMECH-IR  > 非线性力学国家重点实验室
Micro-mechanism and influencing factors of graphene foam elasticity
Wang, Chao1; Zhang, Cun2; Chen, Shaohua3,4
Corresponding AuthorChen, Shaohua(chenshaohua72@hotmail.com)
Source PublicationCARBON
2019-07-01
Volume148Pages:267-276
ISSN0008-6223
AbstractThe emerging graphene foams (GrFs) have received increasing attention in both scientific and engineering fields in recent years. A good elasticity is the prerequisite for its further applications. However, the mechanism and basic characteristics of elasticity of GrFs have not been understood clearly so far. In this paper, we conduct systematic simulations of compression-uncompression and tension-untension to study the characteristics of GrF elasticity using the coarse-grained molecular dynamics (CGMD) method. We find that deformation of GrFs is highly nonuniform at the scale of both flakes and regions, which is qualitatively consistent with the experimental observations. The deformation of GrFs is dominated by the flake bending rather than stretching, which is independent of the loading type, size, shape or thickness of flakes, as well as the density or stiffness of crosslinks. The great asymmetry of elasticity under tension and compression is induced by different mode of bond breaking. Furthermore, by evaluating the elastic energy density, we find that both thicker flakes and more crosslinks are two key factors responsible for good elasticity of GrFs. These results should be useful for understanding GrF elasticity and further design of advanced graphene-based materials. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordGraphene foam Super-elasticity Nonuniformity Deformation mechanism Coarse-grained molecular dynamics
DOI10.1016/j.carbon.2019.03.084
Indexed BySCI ; SCI
Language英语
WOS IDWOS:000468421900029
WOS KeywordSPONGY GRAPHENE ; MECHANISM ; BEHAVIOR ; AEROGELS
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
Funding ProjectNSFC[11502150] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; Natural Science Foundation of Hebei Province of China[A2016210060] ; Higher Education Youth Talents Program of Hebei Province of China[BJ2017052]
Funding OrganizationNSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Science Foundation of Hebei Province of China ; Higher Education Youth Talents Program of Hebei Province of China
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80703
Collection非线性力学国家重点实验室
Corresponding AuthorChen, Shaohua
Affiliation1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
2.Shijiazhuang Tiedao Univ, Dept Engn Mech, Shijiazhuang 050043, Hebei, Peoples R China
3.Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China
4.Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Wang, Chao,Zhang, Cun,Chen, Shaohua. Micro-mechanism and influencing factors of graphene foam elasticity[J]. CARBON,2019,148:267-276.
APA Wang, Chao,Zhang, Cun,&Chen, Shaohua.(2019).Micro-mechanism and influencing factors of graphene foam elasticity.CARBON,148,267-276.
MLA Wang, Chao,et al."Micro-mechanism and influencing factors of graphene foam elasticity".CARBON 148(2019):267-276.
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