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Polymethylmethacrylate-silica hybrid thin films heavily doped with spiropyran and exhibiting visual photochromism and high mechanical and chemical durability

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Abstract

Perhydropolysilazane (PHPS)—polymethylmethacrylate (PMMA)—spiropyran (SP) films were prepared by spin-coating using a solution of a mass ratio, PHPS:PMMA:SP:xylene = 0.8:0.2:0.25:3.6. The SP-doped PHPS-PMMA films were then exposed to the vapor from aqueous ammonia at room temperature, resulting in the formation of 1.7 μm thick, deep-red colored SP-doped PMMA-silica hybrid films. Due to the high concentration of SP, which could be achieved by the hydrophobic nature of PHPS and xylene, the photochromic color changes were visualized in spite of the small film thickness. The films had pencil hardness higher than 9H, and no SP leaching was observed even when the films were soaked in xylene for 24 h. Thus, thin films that exhibit visual photochromism with high mechanical and chemical durability could be prepared, which can never been achieved by conventional sol–gel methods.

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Acknowledgments

This work has been funded by Japan Science and Technology Agency (“Research for Promoting Technological Seeds”) and the High Technology Research Center of Kansai University.

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Authors and Affiliations

  1. Department of Integrated Engineering, Graduate School of Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka, 564-8680, Japan

    Akihiro Yamano

  2. Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka, 564-8680, Japan

    Hiromitsu Kozuka

Authors
  1. Akihiro Yamano
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  2. Hiromitsu Kozuka
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Correspondence to Hiromitsu Kozuka.

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Yamano, A., Kozuka, H. Polymethylmethacrylate-silica hybrid thin films heavily doped with spiropyran and exhibiting visual photochromism and high mechanical and chemical durability. J Sol-Gel Sci Technol 53, 661–665 (2010). https://doi.org/10.1007/s10971-009-2147-3

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  • DOI: https://doi.org/10.1007/s10971-009-2147-3

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