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Facile Method to Functionalize Graphene Oxide and Its Application to PET/Graphene Composite

Cited 95 time in Web of Science Cited 105 time in Scopus
Authors
Shim, Sang Hwa; Kim, Kyung Tae; Lee, Jea Uk; Jo, Won Ho
Issue Date
2012-07
Publisher
American Chemical Society
Citation
ACS Appl. Mater. Interfaces, 2012, 4 (8), pp 4184–4191
Keywords
공학functionalized graphene oxidePET/fGO compositemechanical propertygas barrier property
Abstract
Graphene oxide (GO) prepared in bulk quantities by oxidation of graphite with strong oxidants contains many hydrophilic groups, such as hydroxyl, epoxy, and carboxyl acid. We present a method to efficiently convert these hydrophilic groups into alkyl and alkyl ether groups by a one step reaction of bimolecular nucleophilic substitution with alkyl bromide. The functionalized graphene oxide (fGO) can be homogeneously dispersed as exfoliated monolayers in various organic solvents without degradation of size and shape of graphene oxide sheet. The degree of substitution reaction of each hydrophilic group in GO with alkyl bromide is quantitatively determined by comparing the deconvoluted O 1s X-ray photoelectron spectrum of GO with that of fGO. Addition of a small amount of fGO in poly(ethylene terephthalate) (PET) improves remarkably tensile and gas barrier properties of PET/fGO composite due to homogeneous dispersion of fGO sheets in PET matrix.
Language
English
URI
http://hdl.handle.net/10371/81420
DOI
https://doi.org/10.1021/am300906z
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Others_재료공학부
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