Photochromic Textiles Based upon Aqueous Blends of Oxygen-Deficient WO3-x and TiO2 Nanocrystals

Autor: Roberto Giannuzzi, Vitantonio Primiceri, Riccardo Scarfiello, Marco Pugliese, Fabrizio Mariano, Antonio Maggiore, Carmela Tania Prontera, Sonia Carallo, Cristian De Vito, Luigi Carbone, Vincenzo Maiorano
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Textiles, Vol 2, Iss 3, Pp 382-394 (2022)
Druh dokumentu: article
ISSN: 2673-7248
DOI: 10.3390/textiles2030021
Popis: With the main objective being to develop photochromic smart textiles, in this paper, we studied the photochromic behavior of WO3-x nanocrystals (NCs) cooperatively interacting with variable amounts of TiO2 NCs. We tested several blends of WO3-x:TiO2 NCs, admixed in different compositions (relative molar ratio of 4:0, 3:1, 2:2, 1:3, 0:4) and electrostatically interfacing because of opposite values of Z-potential, for photo-induced chromogenic textiles. We further monitored the photochromic sensitivity of NC-impregnated textiles after exposure to a few solvents (i.e., methanol, ethanol, and isopropanol) or when over-coated with different polymeric matrices such as natural cellulose or ionic conductive Nafion. The optimization of the compositions of the WO3-x:TiO2 blends embedded in polymeric matrices, allowed the nanostructured photochromic textiles to show rapid and tunable coloration (3-x:TiO2-based photochromic smart textiles.
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