POTENTIAL USE OF BRASSICA OLERACEA L. (PURPLE CABBAGE) WASTE AS A VALUABLE SOURCE OF NATURAL COLORANT FOR THE TEXTILE INDUSTRY

Abstract

Wastes of domestic, organic, temple and agricultural origins such as rotten fruits, vegetable peels, flower trimmings and agricultural residues generate large amount of wastes. These wastes must be managed and disposed in an eco-friendly manner for a healthy well-being. If such wastes are not managed by proper means, they lead to various impacts on the environment and also on human beings or mankind. Hence, the main purpose of this work was to study the application of natural dyes obtained from Brassica oleracea L. (purple cabbage) waste extract on cotton fabrics. The components of Brassica oleracea L. were extracted using water and the extract was analysed for the qualitative phytochemicals. The amount of flavonoids and total antioxidant capacity of the extract were identified. Stability of the extract was checked against pH and temperature. The dyeing process was carried out using three different mordant techniques. The test for color fastness was assessed by subjecting the dyed cloth to sunlight and laundering. From our analysis, it was found that the purple cabbage waste extract showed good coloration out of the three different techniques. Pre-mordanting method gave significant results when compared to the normal cotton fabric. Thus, cotton dyeing using the natural extract exhibited moderate result on laundering with hot water and good colour fastness property with sunlight.