Enhanced photochromism of heteropolyacid/polyvinylpyrolidone composite film by TiO2 doping. Issue 10 (25th October 2014)

• Record Type: Journal Article
• Authors: Lu, Cong; Sun, Yan; Liu, Jialu; Wang, Xiansheng; Liu, Su‐Ling; Feng, Wei
• Is Part Of: Journal of applied polymer science. Volume 132:Issue 10(2015:May 15)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2014-10-25
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.41583
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Novel composite film was synthesized by TiO₂ doping into phosphomolybdic acid (PMoA)/polyvinylpyrrolidone (PVP) system. The influence of TiO₂ doping on its microstructure and photochromic properties was investigated via atomic force microscopy, transmission electron microscope, Fourier transform infrared spectroscopy (FT‐IR), ultraviolet–visible spectra, and X‐ray photoelectron spectroscopy (XPS). After TiO₂ doping, the surface of TiO₂/PMoA/PVP composite film changed to rough from smooth, and the particle size significantly increased. The FT‐IR results verified that the basic structure of PMoA and PVP were not destroyed in the composite films. The non‐bonded interaction between the acid and polymer was strengthened by TiO₂ doping. Irradiated with UV light, composite films changed from colorless to blue. The TiO₂/PMoA/PVP composite film exhibited a strong photochromic effect and faster bleaching reaction than that of PMoA/PVP film. XPS results indicated that the amount of PMoA in photo‐reductive reaction was increased after TiO₂ doping, which resulted in the photochromic efficiencies enhanced. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <bold>2015</bold>, <italic>132</italic>, 41583.</p> </abstract>