Fabrication of graphene oxide/montmorillonite nanocomposite flexible thin films with improved gas-barrier properties |
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| Authors: | Se Jung Kim Tan young Kim Byung Hyun Kang Gun-Hwan Lee Byeong-Kwon Ju |
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| Affiliation: | Display and Nanosystem Laboratory, Department of Electrical Engineering, 145, Anam-ro, Seongbuk-gu, Seoul 02841 Republic of Korea.; Korea Institute of Materials Science, Surface Technology Division, 797 Changwondaero Sungsangu, Changwon Gyeongnam Korea, |
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| Abstract: | Nanocomposites are potential substitutes for inorganic materials in fabricating flexible gas-barrier thin films. In this study, two nanocomposites are used to form a flexible gas-barrier film that shows improved flexibility and a decreased water vapor transmission rate (WVTR), thereby extending the diffusion path length for gas molecules. The nanoclay materials used for the flexible gas-barrier thin film are Na+-montmorillonite (MMT) and graphene oxide (GO). A flexible gas-barrier thin film was fabricated using a layer-by-layer (LBL) deposition method, exploiting electronic bonding under non-vacuum conditions. The WVTR of the film, in which each layer was laminated by LBL assembly, was analyzed by Ca-test and the oxygen transmission rate (OTR) was analyzed by MOCON. When GO and MMT are used together, they fill each other''s vacancies and form a gas-barrier film with high optical transmittance and the improved WVTR of 3.1 × 10−3 g per m2 per day without a large increase in thickness compared to barrier films produced with GO or MMT alone. Thus, this film has potential applicability as a barrier film in flexible electronic devices.Nanocomposites are potential substitutes for inorganic materials in fabricating flexible gas-barrier thin films. |
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