Issue 44, 2011
From the journal:

Journal of Materials Chemistry

Aqueous stabilization of graphene sheets using exfoliated montmorillonite nanoplatelets for multifunctional free-standing hybrid films via vacuum-assisted self-assembly†

Chao Zhang,a   Weng Weei Tjiu,b   Wei Fan,a   Zhe Yang,a   Shu Huanga  and  Tianxi Liu*a  

* Corresponding authors

a Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai, P. R. China
E-mail: txliu@fudan.edu.cn
Tel: +86-21-55664197

b Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore, Singapore

Abstract

We report a simple and efficient method to fabricate flexible multifunctional free-standing montmorillonite-graphene (MMT-G) hybrid films viavacuum filtration. Aqueous colloidal dispersion of reduced graphene oxide (r-GO), stabilized by MMT nanoplatelets with variable content of r-GO, has been obtained by direct reduction of graphene oxide (GO) in the presence of exfoliated MMT nanoplatelets. The formation of stable dispersion of graphene sheets in water is a result from two contributing factors, i.e. the hydrogen-bonding interaction and the crosslinking effects originated from sodium ions acting as “crosslinkers” between r-GO sheets and MMT nanoplatelets. Through filtration, the two-dimensional and positively charged MMT and r-GO can self-assemble to form highly oriented hybrid films, where MMT and r-GO stack with each other in a fashion of interlocking arrangements. The MMT-G hybrid films thus obtained show excellent flexibility, electrical conductivity and fire-retardant properties. Therefore, it might be useful to further study and understand the non-covalent interactions between nanoclay and graphene in aqueous media, and open a new strategy for graphene applications in colloidal chemistry.

Graphical abstract: Aqueous stabilization of graphene sheets using exfoliated montmorillonite nanoplatelets for multifunctional free-standing hybrid films via vacuum-assisted self-assembly

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Article information

DOI
https://doi.org/10.1039/C1JM13236A
Article type
Paper
Submitted
12 Jul 2011
Accepted
11 Sep 2011
First published
13 Oct 2011

J. Mater. Chem., 2011,21, 18011-18017

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Aqueous stabilization of graphene sheets using exfoliated montmorillonite nanoplatelets for multifunctional free-standing hybrid films via vacuum-assisted self-assembly

C. Zhang, W. W. Tjiu, W. Fan, Z. Yang, S. Huang and T. Liu, J. Mater. Chem., 2011, 21, 18011 DOI: 10.1039/C1JM13236A

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