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<p>We have shown that the discoloration of photochromic poly(vinyl alcohol)–tungstophosphoric acid (PVA–TPA) nanocomposite films and PVA–TPA films containing glycerol (PVA–TPA–GL) colored by UV irradiation can be greatly accelerated by increasing the concentration of GL in the films and the ambient relative humidity. This study resolves the issues of polymer–heteropolyacid nanocomposites associated with their slow bleaching and, thus, makes them potentially applicable as new functional materials for inkless and erasable printing, anti-counterfeiting, sensors, smart windows.</p>

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Investigation of the Bleaching Properties of Photochromic Nanocomposites Based on Poly(Vinyl Alcohol) and Tungstophosphoric Acid

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • A. A. Gorbachev,
  • O. N. Tretinnikov

摘要

We have shown that the discoloration of photochromic poly(vinyl alcohol)–tungstophosphoric acid (PVA–TPA) nanocomposite films and PVA–TPA films containing glycerol (PVA–TPA–GL) colored by UV irradiation can be greatly accelerated by increasing the concentration of GL in the films and the ambient relative humidity. This study resolves the issues of polymer–heteropolyacid nanocomposites associated with their slow bleaching and, thus, makes them potentially applicable as new functional materials for inkless and erasable printing, anti-counterfeiting, sensors, smart windows.