A Facile Route for the Large Scale Fabrication of Graphene Oxide Papers and Their Mechanical Enhancement by Cross-linking with Glutaraldehyde

Nantao Hu,Zhi Yang,Yanyan Wang,Lei Meng,Eric Siu-Wai Kong,Jing Chai,Yafei Zhang,Rungang Gao

doi:10.1007/bf03353675

Abstract

Abstract A facile route for the large scale production of graphene oxide (GO) papers and their mechanical enhancement has been presented in this work. The novel paper-like GO made from individual GO sheets in aqueous suspension can be achieved in large scale by a simple drop casting method on hydrophobic substrates. Significant enhancement in mechanical stiffness (341%) and fracture strength (234%) of GO paper have been achieved upon modification with a small amount (less than 10 wt%) of glutaraldehyde (GA). The cross-linking reaction takes place between hydroxyl groups on the surface of GO and aldehyde groups of GA, through forming hemiacetal structure, which can result in distinct mechanical enhancement of the GO papers.

Highlights

As a nanometer-thick two-dimensional analog of carbon nanotubes, graphene has aroused much attention owing to its unique combination of electronic, mechanical, chemical, and thermal properties [1,2,3,4,5,6]
We propose a general drop casting method to prepare macroscopic graphene oxide (GO) papers by using a hydrophobic substrate
The graphene oxide (GO) paper can be prepared by a simple drop casting method by drying GO aqueous solution on a hydrophobic substrate

Summary

Introduction

As a nanometer-thick two-dimensional analog of carbon nanotubes, graphene has aroused much attention owing to its unique combination of electronic, mechanical, chemical, and thermal properties [1,2,3,4,5,6]. Yafei Zhang, “A Facile Route for the Large Scale Fabrication of Graphene Oxide Papers and Their Mechanical Enhancement by Cross-linking with Glutaraldehyde”, Nano-Micro Lett. We exploit drop casting method to prepare GO papers on hydrophobic substrates, and the resulting GO papers with large areas and acceptable mechanical properties can be peeled off the substrates.

Results

Conclusion