Effect of copper sulfate pentahydrate on the structure and properties of poly(vinyl alcohol)/graphene oxide composite films |
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| Authors: | Qian Liu Xiang Ge Aimin Xiang Huafeng Tian |
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| Affiliation: | 1. School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing, China;2. Key Laboratory of Carbohydrate and Biotechnology (Ministry of Education), Jiangnan University, Wuxi, China |
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| Abstract: | Poly(vinyl alcohol) (PVA)/graphene oxide (GO)/copper sulfate pentahydrate (CuSO4·5H2O) composite films were prepared by the solution casting method, and the effect of CuSO4·5H2O on the structure and properties of the PVA/GO composites was investigated. Fourier transform infrared (FTIR) analysis proved the crosslinking interaction between CuSO4·5H2O and the ? OH group of PVA. The crystallinity of the composite films increased first and then decreased. For the composite films, the tensile strength, Young's modulus, and yield stress values improved with increasing CuSO4·5H2O, whereas the elongation at break decreased compared with that of the neat PVA/GO composite film. The thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG) patterns of the PVA/GO/CuSO4·5H2O composite films showed that the thermal stability decreased; this was consistent with the TGA–FTIR analysis. A remarkable improvement in the oxygen‐barrier properties was achieved. The oxygen permeability coefficient was reduced by 60% compared to that of the neat PVA/GO composite film. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 44135. |
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| Keywords: | crosslinking mechanical properties membranes properties and characterization thermal properties |
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