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Voltametric monitoring of enzyme-mediated indigo reduction in the presence of various fibre materials

Paper ID Volume ID Publish Year Pages File Format Full-Text
17694 42689 2009 7 PDF Available
Title
Voltametric monitoring of enzyme-mediated indigo reduction in the presence of various fibre materials
Abstract

A comparative study of enzyme-mediated indigo reduction is presented as an environmentally-friendly alternative to alkaline sodium dithionite reduction. The effect of the mediator 1,8-dihydroxy-9,10-anthraquinone in enzymatic reduction was studied by means of voltammetry, both in the presence and absence of different textile materials (polyamide 6, polyamide 6,6 and cotton), and compared to chemically reduced indigo. It was observed that bio-catalytic formation of leuco indigo and its exhaustion on substrates is inversely proportional to the pH within the range of 7–11. Additionally, substrate coloration was strongly influenced by the mediator, resulting in in situ formation of leuco indigo. This effect was most pronounced for polyamide substrates. The reuse of an enzyme-mediated reduction bath for dyeing was assessed showing that the levelness of the obtained shade was either excellent or good at pH 9 and 11, respectively. The wash, perspiration, and light color fastness properties of all textile materials dyed with enzymatically-reduced indigo were comparable or even better than those obtained with chemically reduced indigo. The use of enzyme-mediated reduction of indigo combined with potential reuse of the reduction bath represents a cost effective and environmentally-friendly dyeing process that can be applied for the dyeing of natural cellulosic and synthetic polyamide fibres.

Keywords
Indigo; Enzymes; Mediators; Voltammetry; Polyamide; Cotton
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Voltametric monitoring of enzyme-mediated indigo reduction in the presence of various fibre materials
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 45, Issue 4, 7 October 2009, Pages 317–323
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us