Comparison of the photochromic behaviour of dyes in solution and on polyester fabric applied by supercritical carbon dioxide

Aegean International Textile and Advanced Engineering Conference 2018

Abate, M.T.^1,3,4 ; Seipel, S.^1 ; Viková, M.^2 ; Vik, M.^2 ; Ferri, A.^3 ; Jinping, G.^4 ; Chen, G.^4 ; Nierstrasz, V.A.^1

Textile Materials Technology, Department of Textile Technology, Faculty of Textiles Engineering, and Business, University of Borås, Borås

50190, Sweden^1

Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Liberec

461 17, Czech Republic^2

Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino

10129, Italy^3

College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu

215006, China^4

关键词: Digital ink jet printing;    Naphthopyrans;    photochromic;    Photochromic behaviour;    Photochromic fabrics;    Spirooxazines;    Supercritical carbon dioxides;    Supercritical CO2 (scCO2);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/459/1/012026/pdf
DOI  :  10.1088/1757-899X/459/1/012026

来源: IOP

【 摘 要 】

Photochromic textiles are of considerable interest for smart and functional textile applications due to their remarkable dynamic colour changing effect when irradiated with light of a certain wavelength. The use of resource efficient processes, such as digital inkjet printing and supercritical carbon dioxide (scCO2) dyeing techniques enables an economic production of those high-end functional products with high material costs. In this study, photochromic polyester fabric has been prepared by applying two commercially important photochromic dyes from spirooxazine (SO) and naphthopyran (NP) dye classes using scCO2-dyeing technique. The properties of scCO2 dyed photochromic fabrics were compared with the properties of the same dyes in a non-polar solvent, hexane. UV-Vis spectroscopy and a specially designed online colour measurement system capable of simultaneous UV irradiation and colour measurement were used to evaluate the photochromic colour behaviour. Both photochromic dye types embedded in textile as well as in solution showed significant reversible colour changing properties when exposed to UV light and revert to their original non-coloured form when the UV light is removed. The scCO2 dyed polyester fabrics exhibited similar trends of colour build-up as in solution, while contrasting behaviour was observed in terms of colour changing rates compared to their behaviour in solution.