Laccase-catalysed coloration of wool and nylon / Chetna D. Prajapati in COLORATION TECHNOLOGY, Vol. 134, N° 6 (12/2018)  

[article]  inCOLORATION TECHNOLOGY > Vol. 134, N° 6 (12/2018) . - p. 423-439 Titre : Laccase-catalysed coloration of wool and nylon Type de document : texte imprimé Auteurs : Chetna D. Prajapati, Auteur ; Edward Smith, Auteur ; Faith Kane, Auteur ; Jinsong Shen, Auteur Année de publication : 2018 Article en page(s) : p. 423-439 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyse enzymatique Colorimétrie Composés aromatiques Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Polyamide 66 Solidité de la couleur Teinture -- Fibres textiles Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The potential for laccase (EC 1.10.3.2) to be used within the area of textile coloration, specifically for the generation of decorative surface pattern design, remains relatively unexplored. The current study presents a novel process for the coloration of wool and nylon 6,6 fibres via laccase oxidation of aromatic compounds as an alternative to conventional dyeing methods. Emphasis was placed on producing a diverse colour palette, which was achieved through the investigation of three different aromatic compounds as laccase substrates : 1,4-dihydroxybenzene, 2,7-dihydroxynapthalene and 2,5-diaminobenzenesulphonic acid. Reaction processing parameters such as buffer systems and pH values, laccase and aromatic compounds concentration, and reaction times were investigated, all in the absence of additional chemical auxiliaries. Enzymatically dyed fabrics were tested against commercial standards, resulting in reasonably good colour fastness to wash. To demonstrate the coloration and design potential by laccase catalysation of aromatic compounds, specially constructed fabrics using a combination of undyed wool, nylon and polyester yarns were dyed using the one-step laccase-catalysed coloration process. The use of different fibre types and weave structures enabled simple colour variations to be produced. Shadow, reserve and contrasting effects were achieved with the laccase-catalysed dyeing process developed. Important advantages over conventional processing methods include the use of simpler and milder processing conditions that eliminate additional chemical use and reduce energy consumption. Note de contenu : - EXPERIMENTAL : Materials - Fabric preparation - Enzymatic dyeing (one-step in-situ dyeing process) - Colour measurement of dyed fabrics - Colour analysis of enzyme treatment liquor - Colour fastness of enzyme-dyed fabrics - RESULTS AND DISCUSSION : Effect of pH and buffer systems on the activity of laccase towards aromatic compounds and the coloration of fibres - Analysis of laccase-catalysed colour in enzyme treatment liquors without fabrics - Effect of aromatic compound concentration - Effects of treatment time - Colour fastness - Effect of the amino groups of fibres on laccase-catalysed coloration - Design potential DOI : 10.1111/cote.12350 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12350 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31369 [article]

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Peroxidase-catalysed coloration of wool fabrics / Nalinee Netithammakorn in COLORATION TECHNOLOGY, Vol. 137, N° 2 (04/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 2 (04/2021) . - p. 93-107 Titre : Peroxidase-catalysed coloration of wool fabrics Type de document : texte imprimé Auteurs : Nalinee Netithammakorn, Auteur ; Edward Smith, Auteur ; Claire Lerpinière, Auteur ; Jinsong Shen, Auteur Année de publication : 2021 Article en page(s) : p. 93-107 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyse enzymatique Chimie textile Colorimétrie Essais (technologie) Laine Peroxydase Une peroxydase, souvent écrit abusivement peroxidase comme en anglais1, est une enzyme de type oxydase qui typiquement catalyse une réaction de la forme : AH2 + H2O2 → A + 2 H2O - ROOR' + donneur d'électron (2 e−) + 2H+ → ROH + R'OH. Les peroxydases sont les enzymes parmi les plus universelles du monde vivant. Dans l'organisme, les peroxydases décomposent notamment les composés peroxydes, toxiques. En chimie et biochimie, les peroxydases sont très utilisées comme objet d'étude et réactifs pour des synthèses. La peroxydase de raifort (HRP) est notamment largement utilisée en biotechnologie comme réactif de détection dans les immuno-essais. Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Solidité de la couleur Teinture -- Fibres textiles Textiles et tissus -- Lavage Index. décimale : 667.3 Teinture et impression des tissus Résumé : An enzyme-based textile coloration process using peroxidase (EC1.11.1.7) was investigated for its potential as an alternative to conventional textile dyeing processes, with the benefits of being low in energy use and non-damaging to fibres. The current study presents a process for the coloration of wool fabric using peroxidase oxidation of a range of different aromatic compounds in the presence of hydrogen peroxide. The results revealed that wool can be successfully dyed by peroxidase-catalysed coloration at temperatures as low as 30°C. By controlling the pH values and buffer systems during processing, a diverse colour palette was produced, depending on the small molecular aromatic compound used as the precursor. Colour fastness testing found that fastness to washing, rubbing and light properties achieved good to excellent ratings, with further improvement to wash fastness provided by a post-soaping wash. No fibre damage occurred due to peroxidase-catalysed coloration. This enzyme coloration process is a promising alternative to conventional wool dyeing processes with the advantage of effective dyeing at low temperatures, therefore having the potential of reducing energy consumption and preventing fibre damage. Note de contenu : - EXPERIMENTAL : Materials - Enzymatic dyeing of wool fabrics - Soaping wash for enzymatically dyed wool fabrics - Colour measurement - Scanning electron microscopy analysis - Tensile strength - Colour fastness of enzymatically dyed fabrics - RESULTS AND DISCUSSION : Effect of peroxidase and hydrogen peroxide on the enzymatic coloration of wool fabrics - Effect of processing time and temperature on the enzymatic coloration of wool fabrics - Effect of pH values on the enzymatic coloration of wool fabrics - Effect of different precursors on the peroxidase-catalysed coloration of wool fabrics - Effect of precursor concentration on the enzymatic coloration of wool fabrics - Colour fastness assessments - Peroxidase-catalysed coloration using binary precursors DOI : https://doi.org/10.1111/cote.12510 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12510 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36070 [article]

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