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Dyeing properties, synthesis, isolation and characterization of an in situ generated phenolic pigment, covalently bound to cotton

Paper ID Volume ID Publish Year Pages File Format Full-Text
17766 42694 2009 6 PDF Available
Title
Dyeing properties, synthesis, isolation and characterization of an in situ generated phenolic pigment, covalently bound to cotton
Abstract

Oxidation of colourless dye precursors with laccase enzyme provided simultaneous “in situ” generation and fixation of a pigment on amino groups pre-functionalized cotton fabric. Aromatic amine moieties of 2,5-diaminobenzenesulfonic acid introduced onto tosylated cotton were coupled and copolymerised with a phenolic compound catechol into coloured product covalently fixed on the fabric upon oxidation with laccase. The controlled amination of cellulose in a first step and subsequent colouration allowed for up to 95% pigment fixation on the fabric. Electrochemical studies were performed to elucidate the mechanism of the pigment formation. The pigment was further isolated from the acid hydrolysate of the dyed cellulose fabric to confirm the covalent fixation and to further elucidate the pigment structure by means of FTIR, MS, 1H and 13C NMR analysis. An oligomeric pigment has been identified composed by up to six phenolic units.

Keywords
Laccase; Dyeing; Cotton modification; Covalent linkage; NMR; Electrochemistry
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Dyeing properties, synthesis, isolation and characterization of an in situ generated phenolic pigment, covalently bound to cotton
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 44, Issues 6–7, 8 June 2009, Pages 380–385
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
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Any Questions? feel free to contact us