Preparation of PVA/TiO2 Nanocomposite Films with Various TiO2 Phases by Sol–Gel Technique

Abstract

The titanium oxide (TiO2) nanoparticles were prepared using the sol-gel technique. The calcination temperature (650, 850) ∁ ° has produced the different TiO2 structures (anatase and rutile), and the effect of the calcination temperature of particles was studied. (TiO2) on the structural properties of the prepared nanomaterial. Furthermore, at room-temperature casting process was used to create a PVA/TiO2 nanocomposite with different TiO2 phases. showed the results of X-ray diffraction (XRD) that a qualitative tetragonal crystal structure (antase, rutile) and scanning electron microscopy FE-SEM used to confirm the microstructure of TiO2 nanoparticles and the effect of each of the calcinations (650, 850) and weight percentages (0.2, 0.4, 0.6, 0.8, 1 wt%) from titanium dioxide nanoparticles on electrical properties of the prepared polymeric (PVA) films. The A. C. conductivity, dielectric constant, and the influence of frequency on the value of A. C. conductivity have been investigated. The results of the electrical properties of alternate current have shown that the dielectric constant decreases with increasing the frequency of the applied field and that alternative conductivity and dielectric constantincrease by increasing the concentration of the nanoparticle.