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Photostability and durability properties of photochromic organosilica coating on fabric
journal contributionposted on 2014-09-01, 00:00 authored by Marzieh ParhizkarMarzieh Parhizkar, Yan Zhao, Xungai Wang, Tong Lin
Photochromic fabrics were prepared by a dip-coating method using a silica sol-gel solution containing photochromic dyes. The coated fabric showed a rapid photochromic response. Three methods; incorporating a UV stabilizer in the coating layer, hydrophobic treatment of the porous surface, and covering the coating layer with an additional silica layer; were used to improve the photostability and durability. All three treatments improved the photostability without noticeably changing the photochromic response/fading speeds. Most of the treatments reduced the washing and abrasion durability. The extra coating layer increased the fabric rigidity.