Photochromic fabrics from hybrid silica surface coatings
Parhizkar, Marzieh, Cheng, Tong, Wang, Xungai and Lin, Tong 2010, Photochromic fabrics from hybrid silica surface coatings, in Chemeca 2010 : Proceedings of the 40th Australasian Chemical Engineering Conference, Engineers Australia, [Barton, ACT], pp. 1-3.
In this study, hybrid silica prepared by a sol-gel technique and doped with a photochromic dye was used to produce photochromic coatings on fabric surfaces. The coated fabrics showed a strong photochromic effect with very fast optical response speed. Good coating adhesion was obtained on wool fabrics. The photostability of the photochromic fabrics was improved by three different processes: adding a photo stabilizer, adjusting the surface wettability and sealing off the dye-containing pores with additional silica coating. Four UV stabilizers were added separately to the photochromic silica coatings to investigate their influence on the photostability and photochromic behaviour. The addition of UV stabilizers retarded the photochromic response and reduced photochromic absorption, but increased photochromic lifetime. Among the four UV stabilizers studied, the quencher resulted in the best improvement to the photostability with minimal reduction in the photochromic absorption. Increasing the hydrophobicity of the coating, and sealing-off the dye-containing pores were also found to improve photostability.
Field of Research
091205 Functional Materials 091202 Composite and Hybrid Materials
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