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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/29604


    標題: Bio-inspired cross-linking with borate for enhancing gas-barrier properties of poly(vinyl alcohol)/graphene oxide composite films
    作者: Lai, Cheng-Lee
    Chen, Jung-Tsai
    Fu, Ywu-Jang
    Liu, Wei-Ren
    Zhong, Yueh-Ru
    Huang, Shu-Hsien
    Hung, Wei-Song
    Lue, Shingjiang Jessie
    Hu, Chien-Chieh
    Lee, Kueir-Rarn
    貢獻者: 環境工程與科學系
    關鍵字: Alcohol) Nanocomposite Films
    Mechanical-Properties
    Transport-properties
    Clay Nanocomposite
    Dispersion State
    Membranes
    Transparent
    Water
    Conductivity
    Permeability
    日期: 2015-02
    上傳時間: 2016-04-19 19:01:45 (UTC+8)
    出版者: Pergamon-Elsevier Science Ltd
    摘要: The demand for flexible and transparent barrier films in industries has been increasing. Learning from nature, borate ions were used to cross-link poly(vinyl alcohol) (PVA) and graphene oxide (GO) to produce flexible, transparent high-barrier composite films with a bio-inspired structure. PVA/GO films with only 0.1 wt% GO and 1 wt% cross-linker exhibited an O-2 transmission rate <0.005 cc m (2) day (1) , an O-2 permeability <5.0 x 10 (20) cm(3) cm cm (2) Pa-1 s(-1), and a transmittance at 550 nm >85%; thus, they can be used for flexible electronics. Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy indicated that the outstanding barrier properties are attributed to the formation of chemical cross-linking involving borate ions, GO sheets, and PVA, similar to the borate cross-links in high-order plants. Comparing our experimental data with the Cussler model, we found that the effective aspect ratio was significantly increased after cross-linking, suggesting that cross-linking networks connected GO with each other to form ultra-large impermeable regions. A feasible green technique, with potential for commercial production of barrier films for flexible electronics was presented. (C) 2014 Elsevier Ltd. All rights reserved.
    關聯: Carbon, v.82, pp.513-522
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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