期刊
THIN SOLID FILMS
卷 519, 期 22, 页码 7766-7771出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2011.06.016
关键词
Poly(vinyl alcohol); Graphene; Graphene oxide; Gas barrier; Oxygen diffusivity; Oxygen solubility
类别
资金
- Dong-A University
Composites of poly(vinyl alcohol) (PVA) and graphene oxide (GO) were synthesized by a modified Hummers method and a solution-mixing method. GO was fully exfoliated in the PVA/GO composites. GO did not affect the crystallization of PVA during solvent evaporation. GO is itself an excellent gas barrier without any chemical reduction. The oxygen permeability of the PVA/GO (0.3 wt.%) composite coated film was 17 times lower than that of the pure poly(ethylene terephthalate) (PET) film, with 92% light transmittance at 550 nm. Composites of PVA and reduced graphene oxide (RGO) were synthesized by performing chemical reduction using hydrazine monohydrate. The oxygen permeability of the PVA/RGO (0.3 wt.%) composite coated film was 86 times lower than that of the pure PET film, with 73% light transmittance at 550 nm. The reduction of oxygen permeability was mainly attributed to the reduced oxygen solubility in the PVA/GO composite film, while it was attributed to both the reduced oxygen diffusivity and solubility in the PVA/RGO composite film. (C) 2011 Elsevier B.V. All rights reserved.
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