The compression mechanical properties of graphene aerogel
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China
2 Explosion Protection and Emergency Disposal Technology Engineering Research Center of the Ministry of Education, Beijing, China
3 Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, China
4 Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, China
* Corresponding author: firstname.lastname@example.org
† Corresponding author: email@example.com
Published online: 9 September 2021
Graphene aerogel (GA) samples, prepared by the Sol-Gel method, were tested under quasi-static and dynamical compression, and characterized via surface area analyzer and scanning electron microscopy. The results show that the drying method has a significant influence on the sample’s microstructure as well as its mechanical compression properties. The supercritical CO2 dried sample has a notable higher specific surface area, and higher compression strength; although the freeze dried sample is much lighter than the supercritical CO2 dried sample, it exhibits a nonlinear superelastic behavior and large compressibility with a reversible strain up to 94%; under the dynamic compression test, the supercritical CO2 dried sample presents a negative Poisson’s ratio behavior whereas the flower-like failure pattern was observed for the freeze dried sample. GA, therefore, is a promising candidate for energy absorption purposes because of its very low density, high specific surface area and porous microstructure.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.