Development of functional textiles with flavone dye of ginkgo biloba exocarp and study on dyeing properties

Abstract

In this study, cellulase-assisted extraction of flavonoid dye from the discarded ginkgo biloba exocarp was carried out, and the purified dye were purified by macroporous adsorption resin. The purified dye were applied to silk fiber dyeing. The optimized extraction process of dye by response surface method was as follows: enzymolysis time was 1 h; enzymolysis temperature was 45 °C; enzyme dosage was 10 mg; solid-to-liquid ratio was 1:25. Using potassium aluminum sulfate as mordant, the extracted and purified ginkgo biloba exocarp flavonoid dye was used to dye the silk fiber. The results indicate that the dyed silk fiber has a sandy beige color, and the color fastness of the dyed silk fiber met the taking requirements. The strength of the silk fibers had little change before and after dyeing, and the dyeing uniformity was good. In addition, the dyed silk fibers had good antibacterial property effects against both Staphylococcus aureus and Escherichia coli, and also obtained a certain antioxidant properties. This study not only obtained a simple, energy-saving and environmentally friendly extraction process of flavonoid dye from ginkgo biloba exocarp, but also developed a silk product with good biological function.