Application of nanogold in woolen textiles dyeing

Nanotechnology has a widespread application in textile fields, especially in technical textiles, finishing, and dyeing processes. Accordingly, in this research, we investigated the effect of nanogold as a mordant for woolen textile dyeing. The purpose of this research was to produce a multifunctional woolen textile by applying nanogold particles as a novel mordant. Therefore, after the yarn purification and neutralization, the yarns were pretreated with nanogold (60ppm) in boiling water for 1 hour and then were dyed using the onchrome method. Nanoparticles and dyed yarns were subsequently assessed through DLS, EDS, FESEM, SEM, washing fastness, light fastness, and antibacterial properties. The obtained results indicated that nanogold was absorbed by the wool and the washing fastness was enhanced without affecting softness and causing stains whereas light fastness remains constant. Furthermore, the yarns showed excellent antibacterial properties against Grampositive and Gramnegative bacteria, namely Escherichia Coli and Staphylococcus Aureus.