[article]
| Titre : |
A novel strategy to improve the dyeing properties in laccase-mediated coloration of wool fabric |
| Type de document : |
texte imprimé |
| Auteurs : |
Ting Zhang, Auteur ; Rubing Bai, Auteur ; Qiang Wang, Auteur ; Xuerong Fan, Auteur ; Ping Wang, Auteur ; Jiugang Yuan, Auteur ; Yuanyuan Yu, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 65–72 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorimétrie
LaccasesLes laccases (EC 1.10.3.2) appartiennent à une famille d'enzymes ayant pour cofacteur du cuivre. C'est une oxydase (oxydoréductase, EC 1) que l'on retrouve dans de nombreuses plantes, champignons et micro-organismes.
Le cuivre est lié sur plusieurs sites de la protéine. On distingue trois types. Les types 2 et 3 sont appelés grappe tri-nucléaire. Le cuivre du type 1 est soluble dans l'eau. Le mercure déplace le cobalt complexé dans les laccases. Les complexants du cuivre peuvent le déplacer et le remplacer par du cobalt. Les cyanures complexent également le cuivre, mais dans ce cas il n'est pas possible de réinsérer du cobalt.
Les laccases oxydent les dérivés phénoliques mais d'une façon ménagée qui transforme la lignine en monolignol.
Laine
Microscopie
Polymérisation
Solidité de la couleur
Spectroscopie ultraviolette
Surfaces -- Analyse
Syringique, Acide
Teinture -- Fibres textiles
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
Enzymatic coloration of fabrics has received worldwide attention in recent years. In order to improve the dyeing properties of enzymatically coloured fabrics, a novel strategy using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC), a biological coupling agent, to pretreat wool fabric was employed in this paper. Enzymatic coloration of wool fabrics with syringic acid was carried out in the presence of laccase from Trametes versicolor. The effect of different periods on laccase-catalysed polymerisation of syringic acid was examined by UV-vis spectroscopy. Enzymatic coloration results of dyed wool fabrics were evaluated by means of K/S value and colour difference (?E*). Process parameters, including the dosages of syringic acid and incubation time, that influenced the colour depth were studied. Meanwhile, the colour fastness and levelness of dyed wool fabrics were tested. The results showed that the UV-vis absorbance of reaction solution increased as oxidation time elapsed, and a new peak appeared at 360 nm. After pretreatment, the K/S values and colour difference values of wool fabrics dyed with poly(syringic acid) improved appreciably compared with the control samples without any pretreatment. Moreover, pretreated wool fabrics showed better dyeing fastness and levelness than control samples. |
| Note de contenu : |
- MATERIALS AND METHODS : Pretreatment of wool fabric - Laccase-mediated coloration of wool fabric - UV-vis spectrum analysis - Colour parameter measurement of dyed wool fabric - Surface morphology - Microscopic analysis of wool yarn cross-section - Colour fastness tests
- RESULTS AND DISCUSSION : UV-vis spectra of phenolic acid compound - Colour characteristics of dyed wool fabrics - Surface morphology of wool fabrics - Effects of monomer concentration and incubation time on the colour depth of dyed wool fabrics - Yarn cross-section microscopic analysis - Colour fastness tests |
| DOI : |
10.1111/cote.12252 |
| En ligne : |
https://drive.google.com/file/d/1haab813CNbkDRxt-GXoKDhFiLU_n87uv/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27882 |
in COLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 65–72
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A novel strategy to improve the dyeing properties in laccase-mediated coloration of wool fabric in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)
