Study of Dyestuff in Non-aqueous Solvent Medium for Textile Dyeing
Textile manufacturing processes with conventional wet-chemical processes, especially for the dyeing, printing and finishing of textile, have long been one of the main environmental pollution sources due to the discharge of large amounts of wastewater to environment. According to some literature reports, there were over 600 billion meters of fabrics dyed, printed and finished in China in 2010, and more than 24.0 billion tons of effluents were discharged to environment, which resulted in a serious environmental burden and concern.
In traditional dyeing process, water acts as a solvent medium to dissolve the dyestuff and to bring the dyestuff to the substrate for conducting the dyeing process. Due to limited water resources, more and more researchers are investigating substitutes to replace water, such as supercritical fluid carbon dioxide (SCF-CO2), different types of organic solvent, etc. However, there are still limitation on existing non-aqueous dyeing research approach, especially for natural fibers. In this regard, we aim to explore the use of different non-aqueous solvent medium to enhance the dyeing performance in order to dye natural materials.