Advancement in structural, morphological and dielectric studies of PVA filled TiO_2 and ZnO nanocomposites

摘要

In this article, we report advancement in structural, morphological and dielectric studies of PVA encapsulated titanium dioxide (TiO_2) and zinc oxide (ZnO) nanoparticles. PVA/(x)TiO_2(15-x)ZnO nanocomposites are prepared using solvent casting ex-situ technique for x= 0wt%, 1wt%, 5wt%, 7.5wt%, 10wt%, 14wt% and 15wt% filling concentrations. FTIR spectroscopy reveals the formulation of complexes between the PVA main chain and nano fillers is due to inter/intra molecular hydrogen bonding. The AFM picture shows the uniform grain structure for pure PVA and changes in surface morphology for prepared PVA nanocomposites. The morphological and homogeneous distribution of nano fillers in PVA nanocomposites was observed using SEM and EDAX. AC conductivity studies spectacles that the conductivity increases for different filling concentrations with increase in frequency. The frequency dependent dielectric constants with different filling concentrations are recorded.