In situ synthesis of the reduced graphene oxide-polyethyleneimine composite and its gas barrier properties

Authors
Liu, HongyuKuila, TapasKim, Nam HoonKu, Bon-CheolLee, Joong Hee
Issue Date
2013-03
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.1, no.11, pp.3739 - 3746
Abstract
The ternary roles of polyethyleneimine (PEI) as a reducing agent, a surface modifier and a polymer host have been presented to fabricate reduced graphene oxide (RGO) based composite films with improved gas barrier property. The PEI functionalized RGO dispersion is prepared and filtered to fabricate thin films with a brick and mortar structure. The simultaneous reduction and functionalization of graphene oxide (GO) by PEI are confirmed by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and transmission electron microscopy analysis. The good dispersion of graphene sheets in the PEI matrix and the layered structure is confirmed by X-ray diffraction and field emission scanning electron microscopy analyses. Thermogravimetric analysis also confirms the removal of oxygen functionalities from GO and the attachment of PEI chains to the RGO sheets. The electrical conductivity of the RGO film is found to be 492 S m(-1) at low content of PEI (PEI : GO = 0.02 : 1), and increasing the PEI content leads to a decrease in the electrical conductivity of the films. In contrast, the water dispersibility and gas barrier properties increase with increasing PEI content in the composite film.
Keywords
EXFOLIATED GRAPHITE OXIDE; CHEMICAL-REDUCTION; FUNCTIONALIZED GRAPHENE; POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; PAPER; NANOSHEETS; FILMS; WATER; SHEETS; EXFOLIATED GRAPHITE OXIDE; CHEMICAL-REDUCTION; FUNCTIONALIZED GRAPHENE; POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; PAPER; NANOSHEETS; FILMS; WATER; SHEETS; in situ synthesis; reduced graphene oxide; barrier properties
ISSN
2050-7488
URI
https://pubs.kist.re.kr/handle/201004/128309
DOI
10.1039/c3ta01228j
Appears in Collections:
KIST Article > 2013
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE