Optimization of the application of melanoidin microcapsules from lycium barbarum residue in wool fabric dyeing process

Abstract

The extraction of active substances and other nutrient elements from Lycium barbarum and their application in food, medicine, and cosmetics have always been one of the hot topics for scholars in related fields. However, the residue after the extraction still contains melanoidin, which is an important substance that can be used as an environmentally friendly pigment in the coloring of textiles. Therefore, the rational utilization of the by-products after the processing of Lycium barbarum is the key to sustainable development. For this reason, Lycium barbarum residue was used as the raw material to extract textile-grade dyestuff in this work. The phospholipid microcapsules dyeing process of melanoidin dyestuff from Lycium barbarum residue was optimized by the response surface optimization as follows: liquor ratio of 1:35.15, pH of 4.22 and dyeing temperature of 75.8°C. The results showed that the dyeing temperature reduced by 15°C during the dyeing process by using melanoidins microcapsules dyestuff. Dyed wool fabric with biomordant (pomegranate skin) and after-chrome dyeing has high color fastness, antioxidant, and antibacterial property, which greatly increases the added value of the dyed products.

Keywords

• lycium barbarum residue
• melanoidins
• microcapsule dyes
• wool fabric
• dyeing behavior