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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]
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
XanthophyllesLes 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 grainDOI : 10.1111/cote.12206 En ligne : https://drive.google.com/file/d/1F-KQp4-Gm6sKeKseu7S15gqn6un0UIy4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26352
in COLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 208-216[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18101 - Périodique Bibliothèque principale Documentaires Disponible Improved mechanism of polyester dyeing with disperse dyes in finite dyebath / Bingnan Mu in COLORATION TECHNOLOGY, Vol. 133, N° 5 (10/2017)
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Titre : Improved mechanism of polyester dyeing with disperse dyes in finite dyebath Type de document : texte imprimé Auteurs : Bingnan Mu, Auteur ; Helan Xu, Auteur ; Yiqi Yang, Auteur Année de publication : 2017 Article en page(s) : p. 415-422 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Adsorption
Agrégats (chimie)
Bleu (couleur)
Dispersions et suspensions
Fibres polyesters
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : A new sorption mechanism of polyester dyeing with disperse dyes in water is proposed. It is considered dye aggregates could not be sorbed unless they turn into single molecules. However, this theory could not explain numerous sorption phenomena: sorption continues when equilibrium dye concentration exceeds its solubility; dyeing at long liquor ratio, using microencapsulated or crystal-modified dyes do not change concentration of single dye molecules or dye solubility, but increase sorption rate and quantity in a fixed time. We demonstrate that both single and aggregated dye molecules could be sorbed using CI Disperse Blue 56. Because of the large size and low diffusion rate, dye aggregates could temporarily block sorption channel and prevent entry of other dyes. Therefore, only using extra more dyes could get a dark colour. Series of approaches could be proposed to reduce or eliminate the sorption problems caused by aggregates using the new sorption mechanism. Note de contenu : - EXPERIMENTAL : Materials - Determination of dye solubility in water - Sorption procedures - Determination of dye uptake of dye on polyester fabrics - Pseudo sorption isotherm
- RESULTS AND DISCUSSION : Demonstration of aggregates sorption mechanism - Explain phenomena that could not be explained by mechanism of single-molecule sorption - Methods presented to increase dye uptake based on aggregates sorption theoryDOI : 10.1111/cote.12295 En ligne : https://drive.google.com/file/d/1ZCeVTxw6GatRptU0gMlDrLSeYbuaFW9R/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29200
in COLORATION TECHNOLOGY > Vol. 133, N° 5 (10/2017) . - p. 415-422[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19221 - Périodique Bibliothèque principale Documentaires Disponible