Silane bonded graphene aerogels with tunable functionality and reversible compressibility

Li Zhi Guan, Jie Feng Gao, Yong Bing Pei, Li Zhao, Li Xiu Gong, Yanjun Jean Wan, Helezi Zhou, Nan Zheng, Xu Sheng Du, Lian Bin Wu, Jian Xiong Jiang, Hong Yuan Liu, Long Cheng Tang, Yiu Wing Mai

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

Three-dimensional (3D) graphene-based porous materials with a combination of low density, superelasticity, excellent mechanical resilience and tunable functionalities can be used in diverse applications. Here we report an approach of fabricating the stable and flexible 3D graphene aerogel materials with tunable functionality via a general silane-assisted processing that maintains an effective control of the chemistry, architecture and functionality of these porous structures. Simultaneous reduction and functionalization were achieved under both a low temperature and a low graphene oxide concentration in aqueous solution via using a facile one-step co-assembly method. The introduction of silane bonding tailors both the porous microstructure and the surface property of the lightweight aerogel effectively, subsequently providing improved mechanical properties and versatile functionalities including super compressive elasticity, outstanding cyclic resilient property, good electrical conductivity, stable viscoelastic properties, high level energy absorption capacity, excellent hydrophobicity, remarkable thermal stability and extremely high sensitivity of elasticity-dependent electrical conductivity. This opens up scalable and low-cost ways to the integration of microscopic two-dimensional graphene sheets into macroscopic 3D graphene aerogel materials, thus providing the possibility of fabricating novel lightweight porous aerogel materials with controllable functionalities and reversible compressibility for applications in numerous fields.

Original languageEnglish (US)
Pages (from-to)573-582
Number of pages10
JournalCarbon
Volume107
DOIs
StatePublished - Oct 1 2016

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ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Guan, L. Z., Gao, J. F., Pei, Y. B., Zhao, L., Gong, L. X., Wan, Y. J., Zhou, H., Zheng, N., Du, X. S., Wu, L. B., Jiang, J. X., Liu, H. Y., Tang, L. C., & Mai, Y. W. (2016). Silane bonded graphene aerogels with tunable functionality and reversible compressibility. Carbon, 107, 573-582. https://doi.org/10.1016/j.carbon.2016.06.022