Functionalization of wool fabric using kapok flower and bio-mordant

The use of sustainable techniques for simultaneous colouration and functionalization of textiles is gaining momentum. The colouration of wool by kapok flower extract (KFE) utilizing pre-mordanting technique using tannin-based natural mordant could impart important functional properties to the dyed fabrics. In this study, the wool fabrics were mordanted using tamarind seed coats extract (TSCE) and further dyed with KFE. The effect of TSCE and KFE concentration on the colour values of dyed fabrics was analysed using various concentrations of TSCE and KFE. The dyed fabrics were evaluated for colouration properties (colour values, fastness properties) as well as functional properties like antibacterial and antioxidant activity. The dyed fabrics without pre-mordanting displayed satisfactory colour values (K/S > 1.89) along with satisfactory colour fastness (ratings > 3); however, the pre-mordanted wool displayed enhanced colour values and improved fastness ratings. The dyed wool also showed an excellent antibacterial activity (bacterial colony reduction > 95%) against E. coli and S. aureus. The antioxidant activity of dyed fabrics was found in the range of 79–95%. A novel and sustainable way of functional dyeing of the wool was confirmed. [Display omitted] •Sustainable method of functional dyeing of wool.•Simultaneous dyeing and functionalization of wool using kapok flower extract and bio-mordant.•Satisfactory colour strength and fastness of dyed wool.•Efficient antibacterial and antioxidant activity of dyed wool.