فهرست نشریات علمی دسترسی آزاد ایران

This work describes how to use the solution casting method to add varying amounts (0, 1, 2, 3, and 4) of Y2O3 and SrCO3 nanoparticles (NPs) to polyvinyl alcohol (PVA) composites. The optical microscopy images showed the formation of networked channels inside the polymeric matrix as electrically charged particles, which became more intense at higher nanoparticle concentrations. With the use of field emission scanning electron microscopy (FESEM), the surface of the nanocomposite was examined. The Y2O3 and SrCO3 nanoparticles were found to be consistently and equally distributed throughout the PVA polymer matrix. Fourier transformation spectroscopy (FTIR) was used to analyses the structural characteristics of the nanocomposite and gather data on molecular vibration. The polymer matrix interacted with the additional Y2O3 and SrCO3 nanoparticles, according to FTIR analysis. Physical interactions between Y2O3 and SrCO3 nanoparticles and the PVA polymer matrix have been demonstrated by the FTIR analysis. The dielectric constant and loss were found to be significant of (PVA/Y2O3/SrCO3) nanocomposite decrease with increasing of frequency while, they are increase with content ratio of Y2O3 and SrCO3 NPs. The A.C. conductivity of (PVA/Y2O3/SrCO3) nanocomposite increase with increasing of frequency and concentration of Y2O3 and SrCO3 NPs. Finally, the PVA/Y2O3/SrCO3 nanocomposites were tested for the antibacterial against both gram positive Staphylococcus aureus (S. aureus) and gram-negative Escherichia coli (E. coli). The result obtained that the inhibition zone diameter increased with increasing Y2O3 and SrCO3 NPs. The PVA/Y2O3/SrCO3 nanocomposite exhibited antibacterial activity.