Kim Se Jung, Kim Tan Young, Kang Byung Hyun, Lee Gun-Hwan, Ju Byeong-Kwon
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
RSC Adv. 2018 Nov 20;8(68):39083-39089. doi: 10.1039/c8ra08232d. eCollection 2018 Nov 16.
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 g per m 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.
纳米复合材料是制造柔性气体阻隔薄膜时无机材料的潜在替代品。在本研究中，两种纳米复合材料被用于形成一种柔性气体阻隔薄膜，该薄膜显示出改善的柔韧性和降低的水蒸气透过率（WVTR），从而延长了气体分子的扩散路径长度。用于柔性气体阻隔薄膜的纳米粘土材料是钠蒙脱石（MMT）和氧化石墨烯（GO）。采用逐层（LBL）沉积法，利用非真空条件下的电子键合制备了一种柔性气体阻隔薄膜。通过Ca测试分析了通过LBL组装逐层叠层的薄膜的WVTR，并通过MOCON分析了氧气透过率（OTR）。当GO和MMT一起使用时，它们相互填充空位，形成了一种具有高光学透过率的气体阻隔薄膜，与单独使用GO或MMT制备的阻隔薄膜相比，WVTR提高到3.1×10 g/（m²·天），且厚度没有大幅增加。因此，这种薄膜作为柔性电子器件中的阻隔薄膜具有潜在的应用价值。
