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| 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 |
| 顯示於類別: | [環境工程與科學系(所)] 期刊論文
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