Facile preparation of high refractive index polymer films composited with a tungstophosphoric acid

摘要

In this study, transparent, colorless polymer composites of polyvinyl alcohol (PVA) and tungstophosphoric acid (PWA) with high refractive indices were developed. The composite films were prepared on glass, using a facile spin-coating method, from an aqueous mixture of PVA and PWA without surfactants. The optical properties of the obtained films were investigated using an ultraviolet-visible absorption spectrometer and a prism coupler. Resultant PVA/PWA (90 wt%) composite films exhibited high transparency (90% T) in the visible region and had a high refractive index (n = 1.72). These PVA/PWA films were also compared to corresponding composite films of PVA and titanium oxide (TiO2). (C) 2017 Elsevier B.V. All rights reserved.