| Titre : |
Nonionic surfactants and dispersants for biopolishing and stonewashing with Hypocrea jecorina cellulases |
| Type de document : |
texte imprimé |
| Auteurs : |
Luana Zilz, Auteur ; Martinho Rau, Auteur ; Nelson Budag, Auteur ; Mauro Scharf, Auteur ; Artur M. Cavaco-Paulo, Auteur ; Jürgen Andreaus, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 49-54 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents dispersants (chimie)
CellulasesUne cellulase est une enzyme qui peut décomposer la cellulose. Les cellulases sont classées EC 3.2.1.4. Elles sont produites typiquement par des bactéries, levures et de protozoaires, qui jouent un rôle majeur dans la digestion des animaux, et transformation de la matière organique végétale en humus dans le sol. Elles ont aussi des applications biotechnologiques et industrielles.
Colorants -- Adsorption
CotonLe 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).
Indigo
Polyvinylpyrrolidone
Surfactants
Teinture -- Fibres textiles
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
Cellulases are widely applied in textile finishing, such as for the removal of protruding surface fibrils to reduce pilling propensity and to achieve the worn-out look in denim garments. The main drawback of enzymatic denim processing is the back-staining of indigo, which reduces the desired blue–white contrast. Alongside an accurate selection of the type of cellulase or vigorous post-washing of the garments, the simultaneous application of auxiliaries in the enzymatic treatment may help to reduce back-staining and improve cellulase efficiency. In the present work, the influence of additives such as surfactants and dispersing agents on indigo adsorption and on the treatment of an undyed cotton fabric with Hypocrea jecorina cellulases was investigated. Indigo adsorption was successfully reduced by more than 75% with ethoxylated nonionic surfactants at concentrations below 0.2 g l−1. The weight loss of cotton fabrics after 120 min treatment was significantly increased with nonionic surfactants and polyvinylpyrrolidone. It could be further shown that protein adsorption on the cotton fabric decreased with the increasing concentration of the additives, while the nonionic surfactants were more efficient than the polyvinylpyrrolidone. Adsorption of a complete cellulase mixture was affected differently by the surfactants than by an exoglucanase-free endoglucanase-rich preparation. |
| Note de contenu : |
- EXPERIMENTAL : Indigo adsorption on cotton fabrics in the presence of additives - Enzymatic treatments
- RESULTS AND DISCUSSION : Indigo adsorption on cotton fabric in the presence of additives - Influence of additives on enzyme treatment of cotton fabric - Influence of additives on protein adsorption |
| DOI : |
10.1111/cote.12003 |
| En ligne : |
http://onlinelibrary.wiley.com/doi/10.1111/cote.12003/pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17186 |
in COLORATION TECHNOLOGY > Vol. 129, N° 1 (02/2013) . - p. 49-54
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Nonionic surfactants and dispersants for biopolishing and stonewashing with Hypocrea jecorina cellulases in COLORATION TECHNOLOGY, Vol. 129, N° 1 (02/2013)
