Microwave assisted synthesis of some azo disperse dyes part 2: Eco-friendly dyeing of polyester fabrics by using microwave irradiation

Abstract

This study aimed to use microwave irradiation as a green technique, not only to enhance the dyeing efficiency of disperse-colored polyester fabrics, but also to conserve resources and minimize the environmental effects. Arylazopyrazolopyrimidinones dyes 1-9 were applied to polyester fabrics at 2% shade using conventional method and microwave at 100 °C. Both the color intensity expressed as dye absorption and the fastness characteristics of the dyed fabric were investigated. The K/S values are increased by increasing the time of irradiation from 10-60 minutes. The dyed substrate displayed good light fastness, and very good fastness levels to rubbing, perspiration washing, and sublimation, respectively.

Monoazo disperse dyes based on pyrazolopyrimidinones provide added value

“…In this manner, figure 1, shows the chemical structure of the pyrazolopyrimidinones disperse dyes that were applied for dyeing the polyester fabrics [1][2][3].…”

Design, synthesis, and anti-inflammatory evaluation of new isatin azo disperse dyes: computational studies, molecular docking, and printing performance on polyester fabrics

“…This is in line with the free-volume hypothesis of dispersion dyeing, which states that at high temperatures, dye molecules spread into polyester amorphous regions and become physically conned when they cool. 50,51 Fixation stability is further enhanced by strong van der Waals contacts and p-p stacking between the dye molecules and polyester chains. It was found that substituent-induced electronic effects affected light fastness.…”

Microwave Assisted Synthesis of Some Azo Disperse Dyes part 3: Dye bath Reuse in Dyeing of Polyester

“…Dyeing procedure by using microwave oven had been described in our antecedent research we published [16].…”

“…Dye bath which resulting from first dyeing have been adjusted to pH4.5 then used as a new dye bath at the same conditions of first dyeing that was published before [16].…”