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Effect of copper sulfate pentahydrate on the structure and properties of poly(vinyl alcohol)/graphene oxide composite films
Author(s) -
Liu Qian,
Ge Xiang,
Xiang Aimin,
Tian Huafeng
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.44135
Subject(s) - vinyl alcohol , thermogravimetric analysis , composite number , crystallinity , thermogravimetry , fourier transform infrared spectroscopy , oxide , materials science , thermal stability , polymer chemistry , chemical engineering , graphene , ultimate tensile strength , oxygen permeability , nuclear chemistry , composite material , chemistry , polymer , oxygen , organic chemistry , inorganic chemistry , nanotechnology , engineering
Poly(vinyl alcohol) (PVA)/graphene oxide (GO)/copper sulfate pentahydrate (CuSO 4 ·5H 2 O) composite films were prepared by the solution casting method, and the effect of CuSO 4 ·5H 2 O on the structure and properties of the PVA/GO composites was investigated. Fourier transform infrared (FTIR) analysis proved the crosslinking interaction between CuSO 4 ·5H 2 O 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 CuSO 4 ·5H 2 O, 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/CuSO 4 ·5H 2 O 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.