Investigation of sustainable dyeing on cotton fabrics obtained from extraction of popular avocado seeds in Vietnam

Abstract

Avocado seeds in Viet Nam have more polyphenol content and high antioxidant activity. Avocado seeds have a large amount of common waste every day, and they are not used much for other purposes. This investigation is aimed to set up the proper dyeing methods for cotton fabric 100% based on extracting colorants from avocado seeds. Dyeing solutions were created by dissolving minced avocado seeds with the right moisture in distilled water at 60◦C for 60 min. The liquor ratio used in the investigation is 1:10 for the extraction process and 1:30 for the dyeing condition. The most suitable dyeing parameters were achieved at a dyeing temperature of 60◦C, a dyeing time of 60 min with a dyeing solution concentration of 75% v/v, and pH = 7. Moreover, the common mordanting chemicals such as Tannin, CuSO4.5H2O, and FeSO4.7H2O were mordanted on cotton fabrics, which aimed to check how the color bonding level is strong or weak through values in the color system including 1E, L∗a ∗b ∗ , K/S. It can realize that mordanting chemicals had a strong impact on color fastness and color hue changes of cotton when dyed with solutions from avocado seeds that can create a diverse and attractive natural color collection.