Effect of copper sulfate pentahydrate on the structure and properties of poly(vinyl alcohol)/graphene oxide composite films

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.

Poly (Vinyl Alcohol) Composite Membrane with Polyamidoamine Dendrimers for Efficient Separation of CO2/H2 and CO2/N2

“…Compared with the traditional method of solvent absorption, membrane separation technology has the advantages of low investment cost, compact structure and no secondary pollution [6][7][8] . Polyvinyl alcohol (PVA) membrane is generally used in the mixed gas separation, because it has the large amount of the hydroxyl groups on its surface, which is conducive to the formation of a large diffusion rate difference in the membrane [9][10][11][12][13] . Nevertheless, the separation e ciency and mechanical properties of the membrane are still poor, and it cannot be commercially applied.…”

Poly (Vinyl Alcohol) Composite Membrane with Polyamidoamine Dendrimers for Efficient Separation of CO2/H2 and CO2/N2

“…Compared with the traditional method of solvent absorption, membrane separation technology has the advantages of low investment cost, compact structure and no secondary pollution [6][7][8] . Polyvinyl alcohol (PVA) membrane is generally used in the mixed gas separation, because it has the large amount of the hydroxyl groups on its surface, which is conducive to the formation of a large diffusion rate difference in the membrane [9][10][11][12][13] . Nevertheless, the separation e ciency and mechanical properties of the membrane are still poor, and it cannot be commercially applied.…”

Fabrication and properties of rigid polyurethane nanocomposite foams with functional isocyanate modified graphene oxide

“…[20] In the recent years, GO has become a research hot spot as a nanosized material in improving mechanical properties and thermal properties of polymer materials. [21,22] For the high surface energy, GO is prone to agglomerate, and the dispersibility in the matrix is limited. Surface functionalized GO, by selection of suitable modifiers to react with COOH, OH or epoxy groups on GO, is a good choice to form a good interfacial interaction with the matrix.…”

“…[ 20 ] In the recent years, GO has become a research hot spot as a nanosized material in improving mechanical properties and thermal properties of polymer materials. [ 21,22 ]…”