Jump to main content
Jump to site search

Issue 28, 2012
Previous Article Next Article

High-throughput, direct exfoliation of graphite to graphene via a cooperation of supercritical CO2 and pyrene-polymers

Author affiliations

Abstract

A facile and green approach has been developed using supercritical CO2 as penetrant, expanding agent and antisolvent, and pyrene-polymers as a molecular wedge and modifier, leading to high-throughput graphene dispersions. Herein, two specially designed pyrene-polymers with a large planar aromatic group and two substituted polymer dangling chains have been employed to stabilize the graphene sheets, which show excellent solubility in aqueous and organic solvents. The morphology and quality of the exfoliated graphene sheets are studied by transmission electron microscope (TEM), atomic force microscopy (AFM), Raman, FTIR, and wide-scanning X-ray photoelectron spectroscopy (XPS), which reveal that large scale and high quality graphene flakes are obtained by the facile process. The supercritical CO2, pyrene-polymers and the solvent system have a significant influence on the exfoliation results. The pyrene-polymers attached to the graphene can further integrate graphene with other polymers to form new functional nanocomposites. This solution-based method combines high-throughput production and functionalization of graphene in one step, providing nanoscale building blocks for practical applications.

Graphical abstract: High-throughput, direct exfoliation of graphite to graphene via a cooperation of supercritical CO2 and pyrene-polymers

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Jun 2012, accepted on 09 Sep 2012 and first published on 11 Sep 2012


Article type: Paper
DOI: 10.1039/C2RA21316H
Citation: RSC Adv., 2012,2, 10632-10638

  •   Request permissions

    High-throughput, direct exfoliation of graphite to graphene via a cooperation of supercritical CO2 and pyrene-polymers

    X. Zheng, Q. Xu, J. Li, L. Li and J. Wei, RSC Adv., 2012, 2, 10632
    DOI: 10.1039/C2RA21316H

Search articles by author

Spotlight

Advertisements