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Gel-sol synthesis of surface-treated TiO2 nanoparticles and incorporation with waterborne acrylic resin systems for clear UV protective coatings

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Abstract

Visible transparent UV protective coatings were developed by incorporating nano-TiO2 into waterborne acrylic systems to provide UV protection for UV-sensitive color cool roofing. Water-based high crystalline TiO2 nanoparticle suspension was prepared via a gel-sol method at a basic pH. The TiO2 nanoparticles have an average size of 20 nm and are stable against agglomeration. As-prepared TiO2 nanosuspension is ready to be well dispersed in commercial waterborne acrylic resin system without extra-surface modification. The fabricated TiO2/acrylic nanocomposite coating achieved a UV cut-off below 350 nm with a visible transmission greater than 85% at 700 nm. It is also demonstrated by using Rhodamine 6G that surface modification of nano-TiO2 with a SiO2 insulation layer would suppress the catalytic activity of nano-TiO2 and improve the UV protection for UV and photocatalysis sensitive dyes.

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Acknowledgments

The work is supported by a small business innovation research (SBIR) program (contract number: DE-SC 0003737) from the Department of Energy.

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Authors and Affiliations

  1. Agiltron Inc., 15 Presidential Way, Woburn, MA, 01801, USA

    Changfeng Chen, Yuliang Wang, Guiquan Pan & Qingwu Wang

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  1. Changfeng Chen
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  2. Yuliang Wang
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  4. Qingwu Wang
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Correspondence to Changfeng Chen or Qingwu Wang.

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Chen, C., Wang, Y., Pan, G. et al. Gel-sol synthesis of surface-treated TiO2 nanoparticles and incorporation with waterborne acrylic resin systems for clear UV protective coatings. J Coat Technol Res 11, 785–791 (2014). https://doi.org/10.1007/s11998-014-9583-x

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  • DOI: https://doi.org/10.1007/s11998-014-9583-x

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