Mechanical Property and Structure of Covalent Functionalised Graphene/Epoxy Nanocomposites

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Abstract

Thermally reduced graphene nanoplatelets were covalently functionalised via Bingel reaction to improve their dispersion and interfacial bonding with an epoxy resin. Functionalised graphene were characterized by microscopic, thermal and spectroscopic techniques. Thermal analysis of functionalised graphene revealed a significantly higher thermal stability compared to graphene oxide. Inclusion of only 0.1 wt% of functionalised graphene in an epoxy resin showed 22% increase in flexural strength and 18% improvement in storage modulus. The improved mechanical properties of nanocomposites is due to the uniform dispersion of functionalised graphene and strong interfacial bonding between modified graphene and epoxy resin as confirmed by microscopy observations.

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Electric Field Effect in Atomically Thin Carbon Films

S. Morozov, K. S. Novoselov, A. K. Geim … (2007)

We report a naturally-occurring two-dimensional material (graphene that can be viewed as a gigantic flat fullerene molecule, describe its electronic properties and demonstrate all-metallic field-effect transistor, which uniquely exhibits ballistic transport at submicron distances even at room temperature.

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Preparation and characterization of graphene oxide paper.

Dmitriy A Dikin, Sasha Stankovich, Eric Zimney … (2007)

Free-standing paper-like or foil-like materials are an integral part of our technological society. Their uses include protective layers, chemical filters, components of electrical batteries or supercapacitors, adhesive layers, electronic or optoelectronic components, and molecular storage. Inorganic 'paper-like' materials based on nanoscale components such as exfoliated vermiculite or mica platelets have been intensively studied and commercialized as protective coatings, high-temperature binders, dielectric barriers and gas-impermeable membranes. Carbon-based flexible graphite foils composed of stacked platelets of expanded graphite have long been used in packing and gasketing applications because of their chemical resistivity against most media, superior sealability over a wide temperature range, and impermeability to fluids. The discovery of carbon nanotubes brought about bucky paper, which displays excellent mechanical and electrical properties that make it potentially suitable for fuel cell and structural composite applications. Here we report the preparation and characterization of graphene oxide paper, a free-standing carbon-based membrane material made by flow-directed assembly of individual graphene oxide sheets. This new material outperforms many other paper-like materials in stiffness and strength. Its combination of macroscopic flexibility and stiffness is a result of a unique interlocking-tile arrangement of the nanoscale graphene oxide sheets.

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Graphene oxide dispersions in organic solvents.

J I Paredes, S Villar-Rodil, A Martínez-Alonso … (2008)

The dispersion behavior of graphene oxide in different organic solvents has been investigated. As-prepared graphite oxide could be dispersed in N, N-dimethylformamide, N-methyl-2-pyrrolidone, tetrahydrofuran, and ethylene glycol. In all of these solvents, full exfoliation of the graphite oxide material into individual, single-layer graphene oxide sheets was achieved by sonication. The graphene oxide dispersions exhibited long-term stability and were made of sheets between a few hundred nanometers and a few micrometers large, similar to the case of graphene oxide dispersions in water. These results should facilitate the manipulation and processing of graphene-based materials for different applications.

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Author and article information

Journal

Journal ID (nlm-ta): Sci Rep

Journal ID (iso-abbrev): Sci Rep

Title: Scientific Reports

Publisher: Nature Publishing Group

ISSN (Electronic): 2045-2322

Publication date (Electronic): 14 March 2014

Publication date Collection: 2014

Volume: 4

Electronic Location Identifier: 4375

Affiliations

[1 ]Institute for Frontier Materials, Deakin University , Victoria 3216, Australia

[2 ]Carbon Nexus, Deakin University , Victoria 3216, Australia

[3 ]School of Computing, Engineering and Mathematics , University of Western Sydney, Kingswood, NSW, 2751

Author notes

[a ] minoo.naebe@ 123456deakin.edu.au

Article

Publisher Item ID: srep04375

DOI: 10.1038/srep04375

PMC ID: 3953726

PubMed ID: 24625497

SO-VID: b46a8c54-be63-4d2d-9ae6-84c279856602

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/

Mechanical Property and Structure of Covalent Functionalised Graphene/Epoxy Nanocomposites

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Renewable Energy - Storage

Most cited references 12

Electric Field Effect in Atomically Thin Carbon Films

Preparation and characterization of graphene oxide paper.

Graphene oxide dispersions in organic solvents.

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