Micro-mechanism and influencing factors of graphene foam elasticity
文献类型：期刊论文
| 作者 | Wang C(王超) ; Zhang C(张存); Chen SH(陈少华)
|
| 刊名 | CARBON
 |
| 出版日期 | 2019-07-01 |
| 卷号 | 148页码:267-276 |
| 关键词 | Graphene foam Super-elasticity Nonuniformity Deformation mechanism Coarse-grained molecular dynamics |
| ISSN号 | 0008-6223 |
| DOI | 10.1016/j.carbon.2019.03.084 |
| 通讯作者 | Chen, Shaohua(chenshaohua72@hotmail.com) |
| 英文摘要 | 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. |
| 分类号 | 一类 |
| WOS关键词 | SPONGY GRAPHENE ; MECHANISM ; BEHAVIOR ; AEROGELS |
| 资助项目 | 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] |
| WOS研究方向 | Chemistry ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000468421900029 |
| 资助机构 | 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 |
| 其他责任者 | Chen, Shaohua |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/80702]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang C,Zhang C,Chen SH. Micro-mechanism and influencing factors of graphene foam elasticity[J]. CARBON,2019,148:267-276. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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