Effects of the functionalized graphene oxide on the oxygen barrier and mechanical properties of layer-by-layer assembled films

Title
Effects of the functionalized graphene oxide on the oxygen barrier and mechanical properties of layer-by-layer assembled films
Authors
김선국유남호이원기황준연김명종David Hui구본철이중희
Keywords
layered structure; mechanical properties; thin films; surface analysis; strength
Issue Date
2016-05
Publisher
Composites. Part B, Engineering
Citation
VOL 92, 307-314
Abstract
An effective method to fabricate high-performance oxygen gas barrier films by alternately stacking negatively charged graphene oxide (GO) and positively charged aminno-ethyl-functionalized GO (AEGO) on PET substrates was suggested. The GO was prepared by the Hummer's method using natural graphite powder and the AEGO was synthesized by a carbodiimide reaction of the GO. High resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) were used to characterize the introduction of functional groups of GO and AEGO. GO/AEGO/GO layers on a PET film were formed through spray coating method. The gas barrier and mechanical properties of the film were examined. One layer of GO/AEGO/GO stacked film coated on a PET substrate showed an oxygen permeability of 0.01 cc/m2 day atm, which is 103 times lower than that of pure PET. The results corresponding to tensile strength and modulus of the film revealed an increase of approximately 61 and 41% compared to those of pure PET, respectively.
URI
http://pubs.kist.re.kr/handle/201004/58666
ISSN
13598368
Appears in Collections:
KIST Publication > Article
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