| Titre : |
Enhancing the wash fastness of disperse dyes on wool with oxidants |
| Type de document : |
texte imprimé |
| Auteurs : |
Steven J. McNeil, Auteur ; Larissa I. Zaitseva, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 231-243 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents de blanchiment
Colorants dispersésCatégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester.
Laine
Oxydants
Peroxyde d'hydrogèneLe 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.
Persulfate d'ammonium
Polyesters
Résistance au lavage
Teinture -- Fibres textiles
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
Disperse dyes are not currently applied to wool commercially, in large part because of inadequate wash fastness, but they do have potential, especially for wool-polyester blends. In this study, for the first time hydrogen peroxide was investigated to increase the wash fastness of disperse dyes on wool. In the absence of oxidants, 10 disperse dyes from seven classes imparted colours with a range of depths (K /S 2-26) with wash fastness (grey scale ratings for colour change) grades of 3 to 4-5. Hydrogen peroxide had only small effects on colours and gave only small enhancements to wash fastness, which were limited to anthraquinone, nitrodiphenylamine, disazo and coumarin dyes. The bleach activators Prestogen W and citric acid enhanced the bleaching effect of hydrogen peroxide but did not assist with raising wash fastness. Hydrogen peroxide in post-dyeing scouring made the dyeings brighter but did not significantly enhance wash fastness. Ammonium persulphate, which was included for benchmarking with earlier studies, yellowed the wool and decomposed some dyes. This study extends the range of dye classes whose wash fastness on wool can be improved by ammonium persulphate to now include diazo, coumarin and methine, and confirms that oxidants/free radical initiators have potential for enabling the disperse dyeing of wool. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Methods - Measurements
- RESULTS
- DISCUSSION : Effect of concentration of oxidant during dye exhaustion - Dyeing in the presence of activated HP - HP in the post-dyeing scouring bath - Six classes of disperse dye with single levels of HP and APS |
| DOI : |
https://doi.org/10.1111/cote.12453 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12453 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34296 |
in COLORATION TECHNOLOGY > Vol. 136, N° 3 (06/2020) . - p. 231-243
Aller sur edunet
Accueil
Enhancing the wash fastness of disperse dyes on wool with oxidants in COLORATION TECHNOLOGY, Vol. 136, N° 3 (06/2020)
