Synthesis of (PVA/PEG: ZnO and Co3O4) nanocomposites: Characterization and antibacterial studies

Abstract

Polymer blend (PVA/PEG) and its nanocomposites with constant ZnO and different ratios of Co3O4 NPs films synthesized using solution cast technique. The obtained products were identified by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Optical characteristics have been studied by UV-visible spectroscopy. FT-IR spectra confirmed of the produce the functional groups present in polymer nanocomposite systems. XRD analysis confirmed the formation nanocomposite films more crystalline from the polymeric matrix. SEM showed a powerful dispersion of ZnO and Co3O4 NPs on the surface of the polymeric matrix. The optimum value of transmittance for polymer blend film is about 83% of spectrum in the regions Vis and NIR. Reduced the transmittance of the nanocomposite films towards ultraviolet rays qualifies it to use as a packaging for storage drugs regardless of cost. Two indirect allowed and forbidden transition energy gaps were determined from the absorption spectrum, which its values decreased with increasing the Co3O4 NPs content . All the other parameters under investigation were also influenced by the additives level. Increasing Co3O4 NPs content leads to increase the inhibition zone diameter for antibacterial application.