Antioxidant-assisted coloration of wool with xanthophylls extracted from corn distiller' dry grain / Luyi Chen in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 208-216 Titre : Antioxidant-assisted coloration of wool with xanthophylls extracted from corn distiller' dry grain Type de document : texte imprimé Auteurs : Luyi Chen, Auteur ; Qian Duan, Auteur ; Jiangang Chen, Auteur ; Yiqi Yang, Auteur ; Bijia Wang, Auteur Année de publication : 2016 Article en page(s) : p. 208-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antioxydants Colorants végétaux Laine Teinture -- Fibres textiles Xanthophylles Les xanthophylles sont des molécules de couleur jaune dérivées des carotènes, par ajout d'atomes d'oxygène (fonctions alcool, cétone, époxy, …). Elles appartiennent à la famille des caroténoïdes. On les rencontre dans les chloroplastes ou les chromoplastes des cellules végétales, notamment dans les pétales de certaines fleurs de couleur jaune, orange ou rouge, et chez les algues, par exemple les algues brunes (Phéophycées), où elles masquent la chlorophylle. Index. décimale : 667.3 Teinture et impression des tissus Résumé : Xanthophylls extracted from corn distillers’ dry grain were successfully applied to dye wool fabrics. As a readily available and cost-effective grain processing byproduct, corn distillers’ dry grain contains appreciable amounts of isolable xanthophyll colourants, which can potentially be used in textile coloration. However, the application of xanthophylls as textile colourants has been limited, possibly owing to their hydrophobic nature and lack of stability at higher temperatures. In the present work, dyeing of wool fabrics with xanthophyll dyes was performed in the presence of a solubilising agent (diglyme) and an antioxidant (butylated hydroxytoluene). Dyeing conditions were modelled and optimised by the one-factor-at-a-time method and response surface methodology. Depth of shade of the wool fabrics dyed with 0.33 g l?1 of xanthophylls could be as high as 10.9 ± 0.5, while the colour fastness to laundering and crocking was better than grade 4. The prominent effect of butylated hydroxytoluene on depth of shade (K/S) was further studied using functionally and structurally related model compounds. The K/S-enhancing ability of butylated hydroxytoluene was found to be a synergistic result of its antioxidising and complexing abilities. Lab-extracted xanthophylls of various purities were applied to wool fabrics using the optimised dyeing and aftertreatment conditions. Depth of shade but not colour fastness was significantly affected by the impurities in xanthophylls extracted from corn distillers’ dry grain. The strategy developed by this work not only extends the scope of xanthophyll application into textile coloration but also could be used for other hydrophobic and unstable natural colourants. Note de contenu : - EXPERIMENTAL : Materials - Dyeing procedures - Aftertreatment measurements - Extraction of xanthophylls from corn distillers' dry grain - RESULTS AND DISCUSSION : Optimisation of dyeing by the one-factor-at-a-time method - Optimisation of dyeing by response surface methodology - Role of butylated hydroxytoluene in dyeing property enhancement - Dyeing of wool fabrics using xanthophylls extracted from corn distillers' dry grain DOI : 10.1111/cote.12206 En ligne : https://drive.google.com/file/d/1F-KQp4-Gm6sKeKseu7S15gqn6un0UIy4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26352 [article]

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