Abstract
A smart coating based on a polyurethane cement (PUC) substrate with photochromic behavior and anti-ultraviolet performance was obtained successfully by depositing photochromic sol–gel material on the PUC surface using a simple drop-coating method. The results revealed that the PM concentration considerably affected the photochromic properties. The total color change (ΔE*) was optimum (66) at a PM concentration of 20%. The chromogenic time of the photochromic PUC was 2.4 s, and the fading time was 30 s at room temperature. Furthermore, accelerated aging and abrasion tests suggested that the treated PUC composites had excellent anti-ultraviolet properties and mechanical stability. The results indicate that the proposed photochromic PUC is a promising candidate for many applications, such as road and bridge construction and green buildings.
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Acknowledgements
This work was financially supported by The National Natural Science Foundation Youth Fund of China (31800489), Heilongjiang Postdoctoral Financial Assistance (LBH-Z16007), and the Special Fund for Research on Scientific and Technological Innovation Talents (2017RAQXJ092).
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Jia, D., Bao, W., Jia, Z. et al. Preparation and photo-responsive behavior of reversible photochromic polyurethane cement composites. Appl. Phys. A 126, 373 (2020). https://doi.org/10.1007/s00339-020-03574-7
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DOI: https://doi.org/10.1007/s00339-020-03574-7