Understanding Mechanical Response of Elastomeric Graphene Networks

Scientific Reports
Na NiEduardo Saiz

Abstract

Ultra-light porous networks based on nano-carbon materials (such as graphene or carbon nanotubes) have attracted increasing interest owing to their applications in wide fields from bioengineering to electrochemical devices. However, it is often difficult to translate the properties of nanomaterials to bulk three-dimensional networks with a control of their mechanical properties. In this work, we constructed elastomeric graphene porous networks with well-defined structures by freeze casting and thermal reduction, and investigated systematically the effect of key microstructural features. The porous networks made of large reduced graphene oxide flakes (>20 μm) are superelastic and exhibit high energy absorption, showing much enhanced mechanical properties than those with small flakes (<2 μm). A better restoration of the graphitic nature also has a considerable effect. In comparison, microstructural differences, such as the foam architecture or the cell size have smaller or negligible effect on the mechanical response. The recoverability and energy adsorption depend on density with the latter exhibiting a minimum due to the interplay between wall fracture and friction during deformation. These findings suggest that an improvement ...Continue Reading

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Citations

Feb 10, 2017·Nature Communications·Olivier T PicotEduardo Saiz
Jul 22, 2017·Advanced Materials·Ling QiuDan Li
May 13, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·P R ShainaManu Jaiswal
Jul 18, 2017·Advanced Materials·Xiaoli ZhaoChao Gao
Sep 25, 2018·Nanoscale·Chenwei LiChen-Yang Liu
Feb 23, 2019·Science Advances·Hamzeh KashaniMingwei Chen
Feb 9, 2018·ACS Applied Materials & Interfaces·Jingxia HuangShengrong Yang
Sep 19, 2017·ACS Applied Materials & Interfaces·Victoria G RochaEduardo Saiz
Jun 9, 2018·ACS Applied Materials & Interfaces·Jung-Hwan OhIl-Kwon Oh
Aug 28, 2020·Chemical Reviews·Zhuxing SunYun Hang Hu

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Methods Mentioned

BETA
thermal treatment
scanning electron microscopy
transmission electron microscopy
thermal reduction

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