Low-temperature dyeing of meta-aramid fabrics pretreated with 2-phenoxyethanol / Dan Sheng in COLORATION TECHNOLOGY, Vol. 133, N° 4 (08/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 4 (08/2017) . - p. 320-324 Titre : Low-temperature dyeing of meta-aramid fabrics pretreated with 2-phenoxyethanol Type de document : texte imprimé Auteurs : Dan Sheng, Auteur ; Yunli Wang, Auteur ; Xin Wang, Auteur ; Xuefeng Lu, Auteur ; Jiang Shan, Auteur ; Heng Pan, Auteur ; Genyang Cao, Auteur ; Weilin Xu, Auteur Année de publication : 2017 Article en page(s) : p. 320-324 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Basses températures Fibre aramide Fourier, Spectroscopie infrarouge à transformée de Phénoxyéthanol Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, meta-aramid fibres were pretreated with 2-phenoxyethanol under different conditions to investigate the effect of 2-phenoxyethanol on the dyeing of aramid at low temperature (95 °C). Structural alteration of the pretreated fibres was reflected by thermogravimetry and Fourier transform infrared spectroscopy, indicating more H-bonds, lower crystallinity, and slightly lower thermal stability. The change in structure showed that 2-phenoxyethanol combined with the fibre macromolecules and resulted in swelling of the fibre. Creation of a biphasic system through the addition of 2-phenoxyethanol to the dyeing solution resulted in the cationic dye being partitioned more towards the 2-phenoxyethanol-rich phase than the aqueous phase. The cross-sections of the dyed fibre suggested that the meta-aramid fibre could be dyed more thoroughly with an appropriate concentration of 2-phenoxyethanol. The colour value of aramid fabric was tested by varying the concentration of 2-phenoxyethanol and the temperature of pretreatment, indicating a dramatic improvement in dyeing performance to aramid after 2-phenoxyethanol pretreatment. 2-Phenoxyethanol pretreatment and low-temperature dyeing can overcome the problems of chemical and energy waste while producing a satisfying colour. Note de contenu : - EXPERIMENTAL : Materials - Preparation - Pretreatment - Dyeing - Measurements and characterisations - RESULTS AND DISCUSSION : Thermal analysis - FTIR analysis - Partitionning of dye in a 2-phenoxyethanol-water biphasic mixture - Dye diffusivity - Effect of experimental parameters DOI : 10.1111/cote.12283 En ligne : https://drive.google.com/file/d/160xmjrbmkre8FwTq-Z4EjsOKGP65u2vo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28885 [article]

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Study of the application of modified thiourea dioxide discharge agent in D5 non-aqueous medium / Lan Zhou in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 149-156 Titre : Study of the application of modified thiourea dioxide discharge agent in D5 non-aqueous medium Type de document : texte imprimé Auteurs : Lan Zhou, Auteur ; Jiang Shan, Auteur ; Xiaoyun Liu, Auteur ; Jianzhong Shao, Auteur Année de publication : 2015 Article en page(s) : p. 149-156 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment Coton Le 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). Fragmentation Granulométrie Microscopie électronique à balayage Soie et constituants Textiles et tissus -- Propriétés mécaniques Textiles et tissus imprimés Thiourée Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In view of the low solubility of thiourea dioxide in water and its inertia to most chemical reagents, a novel non-aqueous medium, decamethylcyclopentasiloxane, was introduced to replace water in the grinding process for better dispersibility and discharge stability. In this study, the effects of different grinding methods on the particle size distribution and surface appearance of thiourea dioxide were studied. The influences of aqueous and decamethylcyclopentasiloxane media on the discharge stability of thiourea dioxide in discharge paste were compared. The whiteness, handle, and the tensile strength of the discharge-printed fabric were evaluated. The results showed that the wet grinding process endowed thiourea dioxide with smaller particle sizes and narrower size distributions in the presence of dispersants. Decamethylcyclopentasiloxane as a non-aqueous medium was beneficial in maintaining good discharge stability of thiourea dioxide for a longer time. The fabrics discharged by the prepared thiourea dioxide printing paste had favourable whiteness, good handle, and acceptable tensile strength. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Dyeing process of silk and cotton fabrics - Grinding process of discharge agent thiourea dioxide - White discharge printing process - Characterisation - RESULTS AND DISCUSSION : Particle size analysis - Field emission scanning electron microscopy - Effect of different dispersion media on the whiteness of discharged fabrics - White dischargeability in comparison with conventional discharge agents - The white discharge stability of thiourea dioxide in different dispersion media - Fabric handle - Tensile strength DOI : 10.1111/cote.12129 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12129 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23674 [article]

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