Cleaner Production of natural dye from Arjuna terminalia for silk and wool dyeing

Abstract

AbstractThe effect of microwave (MW) radiations on wool and silk dyeing with extract of Arjun bark (Terminalia Arjuna) powder has been investigated. The wool and, silk & dye powder were irradiated to MW treatment for up to 5 minutes. Dyeing was performed using un-irradiated and irradiated wool and silk with irradiated and un-irradiated dye powder extracts. SEM and FTIR analyses were performed to observe morphological and chemical changes in the fabric's surface before and after irradiation. Different dyeing parameters have been optimized using a central composite design through response surface methodology. Pre- and post-mordanting was done using 0.5-2.5g/100mL of sustainable chemicals and mordants. All dyed fabrics were subjected to color analysis using a Spectra Flash spectrophotometer (SF600). ISO standard methods were employed for colorfastness to light, washing, and rubbing. It has been found that 45mL of acidic extract of 3pH when employed at 75°C for 45 min after microwave treatment up to 2 min., the dyed silk fabric has furnished high yield after finishing. For wool, 35mL of methanolic extract of 5pH when employed at 45°C for 55 min after MW treatment up to 1 min. The dyed wool fabric has furnished a high yield after finishing. Before and after the dyeing of silk and wool, the Selected chemical and bio-mordants have developed colorfast shades.