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Enhanced photochromism of heteropolyacid/polyvinylpyrolidone composite film by T i O 2 doping
Author(s) -
Lu Cong,
Sun Yan,
Liu Jialu,
Wang Xiansheng,
Liu SuLing,
Feng Wei
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41583
Subject(s) - x ray photoelectron spectroscopy , polyvinylpyrrolidone , composite number , materials science , doping , fourier transform infrared spectroscopy , chemical engineering , scanning electron microscope , nuclear chemistry , polymer chemistry , chemistry , composite material , optoelectronics , engineering
Novel composite film was synthesized by TiO 2 doping into phosphomolybdic acid (PMoA)/polyvinylpyrrolidone (PVP) system. The influence of TiO 2 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 TiO 2 doping, the surface of TiO 2 /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 TiO 2 doping. Irradiated with UV light, composite films changed from colorless to blue. The TiO 2 /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 TiO 2 doping, which resulted in the photochromic efficiencies enhanced. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41583.