Scalable Preparation of Photochromic Composite Foils with Excellent Reversibility for Light Printing |
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Authors: | Yijie Zhou Aibing Huang Shidong Ji Huaijuan Zhou Ping Jin Rong Li |
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Institution: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai, China;2. University of Chinese Academy of Sciences, Beijing, China;3. National Institute of Advanced Industrial Science and Technology (AIST), Moriyama, Japan |
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Abstract: | Photochromic inks for repeatable light‐printed media have attracted increasing attention owing to the fact that they may be widely applied to reduce the consumption of papers and plastics and conserve the environment. Therefore, it is of practical significance to develop convenient photochromic inks with a low cost and on a large scale. In this study, a simple one‐step hydrothermal route was used to prepare tungsten trioxide (WO3) nanoparticles, which were further used to make photochromic inks and transparent photochromic films. The obtained transparent photochromic film could rapidly respond to UV light within tens of seconds, then return to its initial state, with different recovery times at different temperatures, and also exhibit good reversible coloration–bleaching effect. A typical polyethylene terephthalate (PET) foil coated with the photochromic ink could also be repeatedly printed with various patterns and displayed excellent rewritable performance over tens of cycles. This study proposes a simple method for widespread applications of WO3‐based photochromic inks. |
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Keywords: | cycling performance organic– inorganic hybrid composites photochromism reversible light printing tungsten |
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