A novel and eco-friendly approach for dyeing polyester / Manman Zheng in COLORATION TECHNOLOGY, Vol. 139, N° 5 (10/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 5 (10/2023) . - p. 552-564 Titre : A novel and eco-friendly approach for dyeing polyester Type de document : texte imprimé Auteurs : Manman Zheng, Auteur ; Yi Sun, Auteur ; Changlong Li, Auteur ; Yinhui Lu, Auteur ; Yingqi Dai, Auteur ; Zongqian Wang, Auteur Année de publication : 2023 Article en page(s) : p. 552-564 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu (couleur) Caractérisation Chlorure de choline Colorants dispersés Catégorie 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. Ethylène glycol Eutectiques Un eutectique est un mélange de deux corps purs qui fond et se solidifie à température constante, contrairement aux mélanges habituels. Il se comporte en fait comme un corps pur du point de vue de la fusion. C'est aussi le point du diagramme (mélange avec une proportion donnée) pour lequel le mélange est à sa température minimale en phase liquide. Cette température est propre à chaque mélange. Fibres polyesters Résistance à l'abrasion Rouge (couleur) solvants Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Disperse dyes do not contain water-soluble groups and are difficult to dissolve in water, so they cannot be directly formulated into dyeing liquor. In the current dyeing process, the solubility of disperse dyes is mainly improved by adding dispersants. However, dispersants are not absorbed by fibres and survive in the dyeing effluent, aggravating the pollution of water bodies and causing difficulties in treatment. Therefore, the development of a novel, eco-friendly dyeing approach is important to overcome these problems. Herein, for the purpose of improving the solubility of disperse dyes and reducing the dosage of dispersants, a deep eutectic solvent consisting of choline chloride/ethylene glycol was employed instead of dispersant to dissolve CI Disperse Blue 79 and CI Disperse Red 343, thus forming liquid disperse dyes. The results show that both CI Disperse Blue 79 and CI Disperse Red 343 were well dissolved in choline chloride/ethylene glycol with excellent stability, and the dissolution behaviour was strongly associated with the dissolution temperature and time. Moreover, polyester fabrics can be dyed successfully with liquid disperse dyes, and it was observed that the K/S value and rubbing fastness were evidently improved at the same dyeing temperature with unchanged colour characteristics, and a higher K/S value could still be obtained by lowering the dyeing temperature. This work establishes a green dyeing process, which reduces dyeing costs and meets the demand for environmental protection. It is also expected to realise the liquid state of disperse dyes, which will help to promote the further development of textile dyeing. Note de contenu : - EXPERIMENTAL : Materials - Preparation of choline chloride/ethylene glycol - Preparation of liquid disperse dyes - Dyeing of polyester fabrics - Micromorphology and size of the dye particles - Fourier Transform-infrared spectroscopy of dyes - Absorption spectrum and stability of liquid disperse dyes - Permeability of dyes - Dyeing spectrum and rubbing fastness - RESULTS AND DISCUSSION : Synthesis and characterisation of choline chloride/ethylene glycol - Dissolution behaviour of disperse dyes in choline chloride/ethylene glycol - Effects of choline chloride/ethylene glycol dissolution on the particle size and micromorphology of dyes - Effects of choline chloride/ethylene glycol dissolution on the chemical structure of disperse dyes - Effects of choline chloride/ethylene glycol dissolution on the dyeing properties of disperse dyes - Proposed dyeing process and mechanism of liquid disperse dyes - Table 1 : Colour uniformity and rubbing fastness of dyed polyester fabrics DOI : https://doi.org/10.1111/cote.12673 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12673 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39835 [article]

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