S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Materials Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Facile Method to Functionalize Graphene Oxide and Its Application to Poly(ethylene terephthalate)/Graphene Composite
Cited 125 time in Web of Science Cited 139 time in Scopus
- Issue Date
- AMERICAN CHEMICAL SOCIETY
- ACS APPLIED MATERIALS & INTERFACES Vol.4 No.8, pp. 4184-4191
- 공학 ; functionalized graphene oxide ; PET/fGO composite ; mechanical property ; gas barrier property
- 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.
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