Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 19, Nov. Suppl, Issue 2017; Page No.(122-129)

INVESTIGATION ON EFFECT OF SALT-FREE ELECTROCHEMICAL DYEING OF COTTON WITH REACTIVE DYES

R. SUKANYA DEVI AND A. ARUNRAJ

Abstract

The major disadvantage of dyeing of cotton requires large amount of salt which increases the effluent load. This paper investigates the effect of salt-free electrochemical dyeing of cotton with reactive dyes. Anthraquinone based Reactive Blue 4 and azo based Orange 4 reactive dyes were taken and four process conditions like applied voltage, distance between electrodes, electrifying time and dyeing time were optimized. The electrochemical dyed samples were evaluated for the K/S values, colour fastness properties and for dye effluent it was evaluated for colour analysis and TDS values in comparison with the conventional dyeing process with salt. The K/S values of the electrochemical dyed fabric samples shows significant increase in the dye strength compared to the conventional dyed samples. There is no significant change in the colour fastness to washing and rubbing, but the TDS of dye bath effluent is reduced by 70 % than the conventional dye bath effluent.

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