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].…”

“…It is worth noting that ultraviolet rays have harmful and dangerous effects on human health, so exposure to ultraviolet rays for long periods may lead to serious diseases, such as skin cancer [1][2][3][4]. In the past, textiles were used and some modifications were made in the thickness of these textiles in order to help protect against UV damage, such as umbrellas and hats, although these modifications are not sufficient to improve the performance of textiles against UV rays.…”

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].…”

Comparison between Low and High Temperature Dyeing of Polyester Fabrics Dyed with Disperse Dyes derived from Enaminones

“…Since the discovery of synthetic fabrics, the use of disperse dyes has been continuously increased in textiles using simple exhausting techniques [1][2][3][4][5][6][7][8]. One method of dye bath reuse is to reconstitute the dye bath by adding the required amount of dyes and chemicals to prevent and reduce contamination.…”