Biotechnology Letters 2006-05-01

Laccase-assisted dyeing of cotton.

Hristina Hadzhiyska, Margarita Calafell, Josep M Gibert, Josep M Dagà, Tzanko Tzanov

Index: Biotechnol. Lett. 28(10) , 755-9, (2006)

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Abstract

Cotton cellulose was dyed "in situ" with a polymeric dye generated by oxidative coupling of colourless 2,5-diaminobenzenesulfonic acid and 1-hydroxyphenol (catechol) with laccase. Up to 70% dye fixation was obtained increasing the concentration of catechol less soluble upon oxidation from 1 to 10 mmol, while 1 mmol of diamine was used. Dye fixation was not achieved using equal molar concentrations of the reagents.