| Micro-mechanism and influencing factors of graphene foam elasticity | |
Wang C(王超) ; Zhang C(张存); Chen SH(陈少华)
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| Corresponding Author | Chen, Shaohua([email protected]) |
| Source Publication | CARBON
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| 2019-07-01 | |
| Volume | 148Pages:267-276 |
| ISSN | 0008-6223 |
| Abstract | The 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. |
| Keyword | Graphene foam Super-elasticity Nonuniformity Deformation mechanism Coarse-grained molecular dynamics |
| DOI | 10.1016/j.carbon.2019.03.084 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000468421900029 |
| WOS Keyword | SPONGY GRAPHENE ; MECHANISM ; BEHAVIOR ; AEROGELS |
| WOS Research Area | Chemistry ; Materials Science |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary |
| Funding Project | NSFC[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 Organization | NSFC ; 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 |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Chen, Shaohua |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/80702 |
| Collection | 非线性力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Wang C,Zhang C,Chen SH. Micro-mechanism and influencing factors of graphene foam elasticity[J]. CARBON,2019,148:267-276.Rp_Au:Chen, Shaohua |
| APA | 王超,张存,&陈少华.(2019).Micro-mechanism and influencing factors of graphene foam elasticity.CARBON,148,267-276. |
| MLA | 王超,et al."Micro-mechanism and influencing factors of graphene foam elasticity".CARBON 148(2019):267-276. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2019435.pdf（4683KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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