Sustainable dyeing of microwave treated polyester fabric using disperse yellow 211 dye

The aim of current work is to evaluate the dyeing performance of newly introduced disperse dye to improve its dyeing behavior onto polyester fabric using microwave radiation. Microwave heating has promisingly improved the disperse dyeing of polyester fabrics. Disperse yellow 211 (Dy 211) has been used to dye the polyester fabric under the influence of microwave treatment. Both the fabric and dye solution, were treated with the microwaves for 1-6 min. Different dyeing parameters such as temperature time, dispersant and dye bath volume were also optimized and ISO standard methods for color fastness were employed to rate the influence of microwave and ultraviolet treatment on disperse dyeing. It is found that microwave treated polyester (Rp, 6 min.), has given good color strength and dark ed shades upon dyeing at 90 degrees centigrade for 40 min. in the presence of 2 g/100 ml of depoestron using 70 ml of irradiated dye solution (Rs, 6 min.) of ph 8. Similarly using dye bath of ph 11, microwave treated polyester (Rp, 6 min.) has given good color strength and darker shades upon dyeing at 70 degrees centigrade for 35 min. in the presence of 1 g/100 ml of dispersant using 50 ml of irradiated dye solution (Rs). ISO standards for fastness to light, washing and rubbing revealed that good to excellent ratings have been obtained from different shades dyed at optimal condition. It is inferred that microwave treatment has not only reduced the dyeing conditions but also improved the color characteristics of dyed polyester fabric. (author)