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A facile approach to chemically modified graphene and its polymer nanocomposites

Zaman, Izzuddin and Hsu-Chiang, Kuan and Qingsi, Meng and Andrew , Michelmore and Nobuyuki , Kawashima and Terry , Pitt and Liqun , Zhang and Sherif, Couda and Luong, Lee and Ma, Jun (2012) A facile approach to chemically modified graphene and its polymer nanocomposites. Advanced Function Materials, 22 (13). pp. 2735-3743.

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Abstract

A scalable approach for the mass production of chemically modified graphene has yet to be developed, which holds the key to the large-scale production of stable graphene colloids for optical electronics energy conversion and storage materials, catalysis, sensors, composite, etc. Here a facile approach to fabricating covalently modified graphene and its polymer nanocomposites is presented. The method involves: i)employing a common furnace, rather than a furnace installed with a quartz tube and operated in inert gas as required in previous studies, to treat a commercial graphite interrelation compound with thermal shocking and ultrasonication and fabricate graphene platelets (GnPs) with a thickness of 2.51+-0.39nm that contain only 7 at% oxygen; ii)grafting these GnPs with commercial, long-chain surfactant which is able to create molecular entanglement with polymer matrixes by taking advantage of the reactions between the epoxide groups of the platelets and the end amine groups of the surfactant to produce chemically modified graphehe platelets (m-GnPs); and iii)solution-mixing m-GnPs with a commonly used polymer to fabricate nanocomposites. These m-GnPs are well dispered in a polymer with imrpoved mechanical properties and a low percolation threshold of electrical conductivity at 0.25col%. This novel approach could lead to the future scalable production of graphehe and its nanocomposites.

Item Type: Article
Uncontrolled Keywords: graphene; nanocomposites; electrical onductivity; toughening; epoxies
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Engineering Mechanics
Depositing User: Normajihan Abd. Rahman
Date Deposited: 19 Aug 2013 07:33
Last Modified: 22 Jan 2015 00:34
URI: http://eprints.uthm.edu.my/id/eprint/3884
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