Effect of N,N-diethyl-m-toluamide on the structure and dyeing properties of meta-aramid and para-aramid fibre / Le-Yan Lei in COLORATION TECHNOLOGY, Vol. 130, N° 5 (10/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 5 (10/2014) . - p. 349-356 Titre : Effect of N,N-diethyl-m-toluamide on the structure and dyeing properties of meta-aramid and para-aramid fibre Type de document : texte imprimé Auteurs : Le-Yan Lei, Auteur ; Ya-Hong Mao, Auteur ; Xiao-Feng Xu, Auteur ; Jin-Qu Zheng, Auteur ; Qing-Kang Zheng, Auteur ; Yu Guan, Auteur ; Xiao-Min Fan, Auteur Année de publication : 2014 Article en page(s) : p. 349-356 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Solubilité 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. Fibre aramide Teinture -- Fibres textiles synthétiques Transition vitreuse Index. décimale : 667.3 Teinture et impression des tissus Résumé : N,N-Diethyl-m-toluamide has been widely used in the mosquito-repellent finishing of textiles over the past few decades, but the use of N,N-diethyl-m-toluamide as a dye carrier for aramid dyeing with disperse dye has been seldom reported. Meanwhile, the application of aramid fibre in clothing is limited because it is difficult to dye. In this work, the effect of N,N-diethyl-m-toluamide on the dyeing properties of aramid fibre was examined by measuring the percentage disperse dye exhaustion under different conditions. In order to understand the mechanism by which N,N-diethyl-m-toluamide promotes the exhaustion of disperse dye on aramid fibre, the ultraviolet-visible spectrum of the dye and N,N-diethyl-m-toluamide solution, the glass transition temperature, the crystalline structure, and the degree of orientation of aramid fibre treated with N,N-diethyl-m-toluamide were measured by ultraviolet-visible spectrophotometry, differential scanning calorimetry, X-ray diffraction analysis, and velocity-oriented tests respectively. The results indicated that N,N-diethyl-m-toluamide not only could reduce the glass transition temperature and degree of orientation of aramid fibre but could also improve the solubility of disperse dye in aqueous solution, and therefore could enhance the percentage disperse dye uptake on aramid fibre, whereas treatment with N,N-diethyl-m-toluamide showed little effect on the crystalline structure of aramid fibre. The results implied that N,N-diethyl-m-toluamide was beneficial to the diffusion of disperse dye molecules into the amorphous region of aramid fibre under the dyeing conditions, but seldom affected the mechanical properties of aramid fibre. Note de contenu : - EXPERIMENTAL : 1. Materials - 2. Pretreatment - 3. Fibre dyeing - 4. Measurement of dye exhaustion and solubility - 5. Measurement of dye solubility - 6. Differential scanning calorimetry - 7. X-ray diffraction analysis - 8. Measurement of degree of orientation - 9. Measurement of tensile strength - RESULTS AND DISCUSSION : 1. Effect of dyeing temperature on percentage dye exhaustion - 2. Effect of N,N-diethyl-m-toluamide concentration on percentage dye exhaustion - 3. Effect of dyeing time on percentage dye exhaustion - 4. Effect of disperse dye concentration on percentage dye exhaustion - 5. Effect of N,N-diethyl-m-toluamide on the solubility of the disperse dye - 6. Effect of N,N-diethyl-m-toluamide on the glass transition temperature of aramid fibre - 7. Effect of N,N-diethyl-m-toluamide on the crystalline structure of aramid fibre - 8. Effect of N,N-diethyl-m-toluamide on the orientation of poly(p-phenylene terephtalamide) fibre - 9. Effect of N,N-diethyl-m-toluamide on the mechanical properties of aramid fibre DOI : 10.1111/cote.12106 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12106 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22073 [article]

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Investigation of a homogeneous activating ozonation method in the rinsing procedure of cotton fabric dyed with reactive dye / Ya-Hong Mao in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 4 (2011) Titre : Investigation of a homogeneous activating ozonation method in the rinsing procedure of cotton fabric dyed with reactive dye Type de document : texte imprimé Auteurs : Ya-Hong Mao, Auteur ; Yu Guan, Auteur ; Deng-Hong Luo, Auteur ; Qing-Kang Zheng, Auteur ; Xi-Ning Feng, Auteur ; Xiu-Xing Wang, Auteur Année de publication : 2011 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Oxydation Colorants réactifs 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). Eaux usées -- Epuration Rinçage Teinture -- Fibres textiles Tétra-acétyl-éthylène-diamine Textiles et tissus Index. décimale : 667.3 Teinture et impression des tissus Résumé : The textile dyeing process requires the consumption of large quantities of water, which includes huge amounts of coloured wastewater. Usually the rinsing of dyed fabric and the treating of the dyeing house wastewater are separated. The two independent processes not only increase the difficulty of wastewater treatment but also increase the costs of the treatment. In this paper, the ozone/tetraacetylethylenediamine active oxidation technology was employed to rinse dyed fabric and to decolorise the rinsing wastewater simultaneously. The effects of the rinsing conditions on the decolorisation ratio and the chemical oxygen demand Cr value of treated wastewater, and the K/S value, colour difference, tensile strength and fastness of dyed samples were investigated. The results indicated that the decolorisation ratio of the rinsing effluent was greater than 80% and the chemical oxygen demand Cr value decreased more than 58% by the ozone/tetraacetylethylenediamine rinsing process compared with that of traditional rinsing processes. Furthermore, the curve of decolorisation kinetics was in good agreement with a pseudo-first-order kinetic model. In addition, the decolorisation mechanism was also discussed after ultraviolet–visible and ultra performance liquid chromatograph–mass spectrometry analyses of the degraded dye molecule. Note de contenu : EXPERIMENTAL : Materials - Ozonation decolorisation experiment - Dyeing procedure - Rinsing process - Measurements of the output quantity and the utilisation of ozone - Measurements of rinsing effluent - Analysis of the decolorisation kinetics - Tests of dyed fabrics - Measurement of liquid and air surface tension - Analysis of degradation products. RESULTS AND DISCUSSION : Effect of rinsing conditions on the decolorisation ratio of rinsing effluent - Environmental effect of ozone/TAED rinsing effluent - Ozonation decolorisation reaction kinetics - Effect of ozone/TAED rinsing on the dyed fabric - Destruction of the dye molecule during the ozone/TAED rinsing process. DOI : 10.1111/j.1478-4408.2011.00309.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11906 [article]

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