An alternative synthesis route to graphene oxide: influence of surface chemistry on charge transport in epoxy-based composites
An alternative synthesis route to graphene oxide: influence of surface chemistry on charge transport in epoxy-based composites
A synthetic route for the production of graphene oxide is described, in which the commonly used potassium permanganate (KMnO4) is replaced by chromium trioxide (CrO3) as the oxidizing agent. Raman spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy demonstrate that the product is characterized by a reduced level of oxidation and a reduced defect content, compared to conventional graphene oxide (GO). We therefore term the product moderately oxidized graphene oxide (mGO). In comparison with GO, it is shown that when introduced into an epoxy matrix, mGO offers significant potential benefits. These include: excellent compatibility with the epoxy matrix leading to a low percolation threshold for electrical conductivity (~ 0.5 vol%); an associated increase in electrical conductivity of about eight orders of magnitude; no adverse influence on the epoxy curing reactions; potentially simplified material processing strategies.
8302-8318
Vryonis, Orestis
4affde05-88f2-436f-b036-dceedf31ea9c
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
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Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
June 2019
Vryonis, Orestis
4affde05-88f2-436f-b036-dceedf31ea9c
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Vryonis, Orestis, Andritsch, Thomas, Vaughan, Alun and Lewin, Paul
(2019)
An alternative synthesis route to graphene oxide: influence of surface chemistry on charge transport in epoxy-based composites.
Journal of Materials Science, 54 (11), .
(doi:10.1007/s10853-019-03477-w).
Abstract
A synthetic route for the production of graphene oxide is described, in which the commonly used potassium permanganate (KMnO4) is replaced by chromium trioxide (CrO3) as the oxidizing agent. Raman spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy demonstrate that the product is characterized by a reduced level of oxidation and a reduced defect content, compared to conventional graphene oxide (GO). We therefore term the product moderately oxidized graphene oxide (mGO). In comparison with GO, it is shown that when introduced into an epoxy matrix, mGO offers significant potential benefits. These include: excellent compatibility with the epoxy matrix leading to a low percolation threshold for electrical conductivity (~ 0.5 vol%); an associated increase in electrical conductivity of about eight orders of magnitude; no adverse influence on the epoxy curing reactions; potentially simplified material processing strategies.
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Accepted/In Press date: 21 February 2019
e-pub ahead of print date: 27 February 2019
Published date: June 2019
Identifiers
Local EPrints ID: 429321
URI: http://eprints.soton.ac.uk/id/eprint/429321
ISSN: 0022-2461
PURE UUID: 0ba9fcf6-2b14-40b3-8b2d-666a9e8c276f
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Date deposited: 26 Mar 2019 17:30
Last modified: 16 Mar 2024 04:23
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Author:
Orestis Vryonis
Author:
Thomas Andritsch
Author:
Alun Vaughan
Author:
Paul Lewin
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