Twin-Structured Graphene Metamaterials with Anomalous Mechanical Properties

Zaishan Lin; Jiaqi Dong; Xin Wang; Qitao Huang; Xi Shen; Minglong Yang; Xianxian Sun; Ye Yuan; Shasha Wang; Yuanhao Ning; Shuang Yang; Weilong Yin; Menglin Li; Yiwei Sun; Qiangqiang Zhang; Yibin Li

doi:10.1002/adma.202200444

Twin-Structured Graphene Metamaterials with Anomalous Mechanical Properties

Adv Mater. 2022 Apr;34(17):e2200444. doi: 10.1002/adma.202200444. Epub 2022 Mar 17.

Authors

Zaishan Lin^{1

2}, Jiaqi Dong³, Xin Wang^{1

2}, Qitao Huang⁴, Xi Shen⁵, Minglong Yang^{1

2}, Xianxian Sun^{1

2}, Ye Yuan⁶, Shasha Wang^{1

2}, Yuanhao Ning^{1

2}, Shuang Yang^{1

2}, Weilong Yin^{1

2}, Menglin Li⁷, Yiwei Sun⁸, Qiangqiang Zhang³, Yibin Li^{1

2

6}

Affiliations

¹ National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150080, P. R. China.
² Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China.
³ College of Civil Engineering and Mechanics, Key Laboratory of Mechanics on Disaster and Environment in Western China (The Ministry of Education of China), Lanzhou University, Lanzhou, 730000, P. R. China.
⁴ School of Mechanical Engineering, Harbin Institute of Technology, Harbin, 150080, P. R. China.
⁵ Department of Aeronautical and Aviation Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, 999077, China.
⁶ School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
⁷ Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, P. R. China.
⁸ School of Materials Science and Engineering, School of Energy and Environment, Southeast University, Nanjing, 210096, P. R. China.

PMID: 35218071
DOI: 10.1002/adma.202200444

Abstract

Typically, solid materials exhibit transverse contraction in response to stretching in the orthogonal direction and transverse expansion under compression conditions. However, when flexible graphene nanosheets are assembled into a 3D porous architecture, the orientation-arrangement-delivered directional deformation of micro-nanosheets may induce anomalous mechanical properties. In this study, a 3D hierarchical graphene metamaterial (GTM) with twin-structured morphologies is assembled by manipulating the temperature gradient for ice growth during in situ freeze-casting procedures. GTM demonstrates anomalous anisotropic compression performance with programable Poisson's ratios (PRs) and improved mechanical properties (e.g., elasticity, strength, modulus, and fatigue resistance) along different directions. Owing to the designed three-phase deformation of 2D graphene sheets as basic microelements, the twin-structure GTM delivers distinctive characteristics of compressive curves with an apparent stress plateau, and follows a strengthening tendency. This multiscale deformation behavior facilitates the enhancement of energy loss coefficient. In addition, a finite element theory based numerical model is established to optimize the structural design, and validate the multiscale tunable PR mechanism and oriented structural evolution. The mechanical and thermal applications of GTM indicate that the rational manipulation-driven design of meta-structures paves the way for exploring graphene-based multifunctional materials with anomalous properties.

Keywords: Poisson's ratio; anomalous mechanical properties; graphene metamaterials; twin structures.

Abstract

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