Kim, Seon-Guk You, Nam-Ho Lee, Wonki Hwang, Jun Yeon Kim, Myung Jong Hui, David Ku, Bon-Cheol Lee, Joong Hee 2024-01-20T04:04:26Z 2024-01-20T04:04:26Z 2021-09-05 2016-05-01 1359-8368 https://pubs.kist.re.kr/handle/201004/124080 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/m(2) day atm, which is 10(3) 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. (C) 2016 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD NANOSHEETS NANOCOMPOSITES TRANSPARENT Effects of the functionalized graphene oxide on the oxygen barrier and mechanical properties of layer-by-layer assembled films Article 10.1016/j.compositesb.2016.02.028 1 COMPOSITES PART B-ENGINEERING, v.92, pp.307 - 314 COMPOSITES PART B-ENGINEERING 92 307 314 scie scopus 000374609400027 2-s2.0-84960370543 Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Article NANOSHEETS NANOCOMPOSITES TRANSPARENT Layered structures Thin films Mechanical properties Surface analysis Strength