Layer-by-layer assembled graphene oxide films and barrier properties of thermally reduced graphene oxide membranes

Title
Layer-by-layer assembled graphene oxide films and barrier properties of thermally reduced graphene oxide membranes
Authors
김선국박옥경이중희구본철
Keywords
layer-by-layer assembly; graphene oxide; water vapor transmission rate; oxygen transmission rate; barrier properties
Issue Date
2013-10
Publisher
Carbon Letters
Citation
VOL 14, NO 4, 247-250
Abstract
In this study, we present a facile method of fabricating graphene oxide (GO) films on the surface of polyimide (PI) via layer-by-layer (LBL) assembly of charged GO. The positively charged amino-phenyl functionalized GO (APGO) is alternatively complexed with the negatively charged GO through an electrostatic LBL assembly process. Furthermore, we investigated the water vapor transmission rate and oxygen transmission rate of the prepared (reduced GO [rGO]/rAPGO)10 deposited PI film (rGO/rAPGO/PI) and pure PI film. The water vapor transmission rate of the GO and APGO-coated PI composite film was increased due to the intrinsically hydrophilic property of the charged composite films. However, the oxygen transmission rate was decreased from 220 to 78 ㎤/㎡·day·atm, due to the barrier effect of the graphene films on the PI surface. Since the proposed method allows for large-scale production of graphene films, it is considered to have potential for utilization in various applications.
URI
http://pubs.kist.re.kr/handle/201004/46220
ISSN
19764251
Appears in Collections:
KIST Publication > Article
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