The effect of ultrasound on environmentally extraction and dyeing of wool yarns

Reducing pollution in various industries such as textile is very important. In this paper, two parallel methods were used to reduce pollution of the process and application of dye. The first approach was the selection of plant-based dyes (Madder with the botanical name of Rubia tinctorum and Reseda with botanical name of Reseda odorata) and the application of a tannin-based mordant (pomegranate peel with botanical name of Punica granatum). The second approach was extraction and dyeing in ultrasound media. The extraction efficiency of madder, Reseda, and pomegranate peel in water with the ultrasound-assisted method was 23%, 33%, and 29%, respectively. In this paper, the meta-mordanting method was used for mordanting procedure, and to compare the results, Cu (copper) was selected as the mineral mordant. Extracts were identified by FTIR method. Yarns’ changes in the process of mordanting and dyeing are investigated using two methods, FTIR and SEM. The effect of changing the concentration of mordant and dyes with the amount of K/S were evaluated and the K/S value of dyed samples illustrated that increasing the dye concentration of the dye increases the amount of K/S. The color fastness properties of all samples were investigated using the ISO standards.