Upcycling Agricultural Waste for Functional Interfaces: Yellow Onion Skin-Derived Dyes for Cellulosic Materials.

ABSTRACT: The growing environmental and health concerns associated with synthetic dyes have increased interest in natural alternatives. This study investigates the multifunctional properties of yellow onion skin extract as a sustainable dye source for cellulosic substrates, assessing the extract's functional properties beyond coloration. The extract was applied to premordanted cellulose nanofiber films (CNF) with a concentration of 2 g/L and knitted cotton fabric 0.125 g/L at 80 °C for 60 min, and its impact on UV protection, antioxidant properties, and dye stability was investigated. To enhance adsorption, biobased polyelectrolytes, including chitosan, tannic acid, and organic acids, were used as mordants and compared to metal mordants. Surface interactions between the cellulosic substrate and dye

SUBMITTER: Sharma R 

PROVIDER: S-EPMC12368664 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature