Bio-inspired cross-linking with borate for enhancing gas-barrier properties of poly(vinyl alcohol)/graphene oxide composite films

doi:10.1016/j.carbon.2014.11.003

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/29604

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Title:	Bio-inspired cross-linking with borate for enhancing gas-barrier properties of poly(vinyl alcohol)/graphene oxide composite films
Authors:	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
Contributors:	環境工程與科學系
Keywords:	Alcohol) Nanocomposite Films Mechanical-Properties Transport-properties Clay Nanocomposite Dispersion State Membranes Transparent Water Conductivity Permeability
Date:	2015-02
Issue Date:	2016-04-19 19:01:45 (UTC+8)
Publisher:	Pergamon-Elsevier Science Ltd
Abstract:	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.
Relation:	Carbon, v.82, pp.513-522
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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