Enhancing sustainability and hygiene in dyeing of wool yarn with Daphne mucronata

چکیده مقاله

This study investigates the potential of Daphne mucronata as a sustainable natural dye source for textiles using Design Expert. It examines the influence of dyeing conditions (such as mordant con- centration, dyeing temperature, dyeing duration, pH of dyeing bath, extract concentration), and various mordant types (aluminium potassium sulphate, iron(II) sulphate, copper sulphate, and tin(II) chloride), on color characteristics and antibacterial properties of dyed samples. Quantita- tive analysis reveals the distinct yellow hue achieved through the use of different parts of Daphne mucronata extract, with hues ranging from 83 to 91, producing warm tones. Optimizing dyeing conditions with the leaf extract, including dyeing temperature of 80 °C, mordant concentration of 10 owf, bath pH of 8, dye concentration of 150 owf, and dyeing duration of 30 min, results in a significant desirability of 91.4%, offering potential for reduced energy consumption. Comprehen- sive color fastness assessments highlight the good washing and light fastness of leaf extract with tin (Sn) or aluminum (Al) mordants. Significantly, the mechanical properties of dyed wool yarns from leaf, fruit, and root extracts with aluminum mordant show only negligible variations (∼−10%) in maximum tenacity. Furthermore, fruit and leaf extracts exhibit antibacterial proper- ties against S. aureus at low concentrations, potentially reducing the need for chemical antimicro- bial treatments in textiles. Daphne mucronata emerges as a promising natural colorant, offering at- tractive hues and antibacterial benefits for sustainable textile dyeing.