Dyeing of cotton fabric with reactive disperse dye contain acyl fluoride group in supercritical carbon dioxide

• Published in: Dyes and pigments Vol. 139; pp. 566 - 574
• Main Authors: Yang, Da-fa, Kong, Xiang-jun, Gao, Dan, Cui, Hong-sheng, Huang, Ting-ting, Lin, Jin-xin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2017
• Subjects: Acyl fluoride; Cotton fabric; Hydrogen bond; Reactive disperse dye; Supercritical carbon dioxide; Synergistic activation mechanism; Acyl fluoride; Synergistic activation mechanism; Supercritical carbon dioxide; Cotton fabric; Reactive disperse dye; Hydrogen bond
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/j.dyepig.2016.12.050

Reactive disperse dyes with mono- and bi-acyl fluoride reactive groups have been synthesized using a simple and convenient method. The structures of these dyes have been defined by 1H, 13C and 19F NMR. The cotton dyeing in supercritical carbon dioxide (Sc CO2) with dyeing temperature varying from 60 °C to 120 °C and time between 1 h and 3 h and with the concentration of 0.5% owf (on weight of fabric) have been studied. Significant improvement of the color fastness of washing and rubbing has been observed owing to the covalent bond formed between the reactive group of dyes and the functional group of cotton fibers. Besides, the dyed fabrics possess favorable fastness properties, indicating the achievement of lower-temperature dyeing of cotton in Sc CO2. Additionally, the end products meet the garment dyeing standards as well. A mechanism of dyeing process is tentatively speculated meanwhile. [Display omitted] •Dyeing cotton with acyl fluoride reactive disperse dyes obtained good results.•Dyeing experiment was conducted in ScCO2 without adding any auxiliaries.•Dyeing experiment realized dyeing cotton fabric at relative lower temperature.•The color characteristics and the surface informations of dyed cotton were studied.•A probably mechanism of hydrogen bond synergistic process was tentatively proposed.