Influence of CdS nano-additives on optical, thermal and mechanical performance of CdS/polyvinyl alcohol nanocomposites

摘要

CdS/PVA nanocomposites have been prepared by solution casting method where 0.5, 1, 2 and 3 wt% of CdS nanoparticles (NPs) were added to polyvinyl alcohol (PVA) polymer as filler. The structure identification of PVA and CdS/PVA nanocomposites films was carried out by the X-ray diffraction (XRD) and transmission electron microscopy (TEM). The average particle size of CdS in PVA matrix was in nano-scale and increases gradually with the increasing of CdS NPs ratio. The thermal stability of PVA and CdS/PVA films has been evaluated using thermogravimetric analysis (TGA). Mechanical properties (tensile strength and elongation) of CdS/PVA films have been discussed in terms of the dispersion of CdS NPs into PVA polymer matrix and the ratio of CdS NPs. PVA and CdS/PVA films all of them have direct optical band gap which was decreased by increasing of CdS NPs ratio.The effect of concentration of the filler particles (CdS NPs) and gamma-irradiation, with different doses on the thermal stability, mechanical properties and optical band gap of CdS/PVA nanocomposites films has been studied. (C) 2016 Elsevier GmbH. All rights reserved.