Investigation of the uptake and compatibility behaviors of special disperse dyes developed for sustainable color matching in supercritical carbon dioxide

The uptake and compatibility behaviors of nine developed special disperse dyes belonging to different temperature groups were investigated for the first time on polyester fabric to achieve appropriate dyes for sustainable color matching in supercritical fluid of carbon dioxide (SCF-CO2). Different temperature-rising dyeing rate curves for the special dyes were established and employed to explore their uptake behaviors, compatibilities and other performances in SCF-CO2. Furthermore, the dye uptake behaviors and coloration compatibilities were also investigated at different system temperatures, pressures and dyeing durations. Then, a practical color matching was further carried out by utilizing low-temperature group dyes as a model in SCF-CO2. The obtained results show that an overall satisfactory uptake and compatibility behaviors of the developed dyes were achieved as for sustainable color matching, which were assigned to different temperature types in SCF-CO2. The temperature-rising dyeing rate curves for high-, moderate- and low-temperature type dyes show that very similar uptake behaviors and enhancement tendencies were obtained with the increase of system temperature and duration, accompanied with good coloration performances at uptake ratio ranging from 70 % to 90 % in a large supercritical dyebath. Moreover, significant and similar effects on the uptake behaviors of an individual group dyes from the parameters were achieved, which further indicate that good color matching compatibilities and uptake behaviors for each group dyes were available at different conditions. The practical color matching as well as the monochrome coloration in SCF-CO2 shows that different target shades in gray or various neutral colors, etc., were successfully achieved with low-temperature group dyes, by exhibiting perfect leveling property, high color fastness, which fully met industrial requirements in quality and environmentally friendly characteristics with water free.