Novel Route for Dyeing of Cotton with Turmeric for Imparting Mosquito Repellent and UV Protection Properties

Nowadays, sustainable approaches for the colouration of textiles are in high demand. Functional textiles remain a top choice for the user as they serve dual functions. The present study focuses on the utilisation of turmeric natural dye for dyeing of cotton using a novel method. A mosquito-repellent ethyl anthranilate was diazotised in the presence of sodium nitrite and hydrochloric acid. The diazotised derivative of ethyl anthranilate was reacted with turmeric-treated fabric by in-situ azoic dyeing method. The developed dyed fabric was evaluated for fastness and colour measurements. Functional effects provided by dyed fabrics (mosquito repellency and UV protection) were also assessed using standard methods. Dyed fabrics indicated excellent UV protection and 100 % mosquito repellency. The introduction of functional groups (azo and aromatic) of the developed dye in the cotton was also confirmed through FTIR analysis. A novel functional finishing-cum-dyeing approach for the functionalization of cellulosic fabrics was explored using turmeric extract and ethyl anthranilate.