Preparation of cationic viscose and its salt-free dyeing using reactive dye / Yue Li in COLORATION TECHNOLOGY, Vol. 138, N° 4 (08/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 378-387 Titre : Preparation of cationic viscose and its salt-free dyeing using reactive dye Type de document : texte imprimé Auteurs : Yue Li, Auteur ; Shixiong Zhai, Auteur ; Weiwei Dong, Auteur ; Chengjian Yao, Auteur ; Zhuizhui Fan, Auteur ; Kaili Jin, Auteur ; Hong Zhao, Auteur ; Mengting Wang, Auteur ; Zaisheng Cai, Auteur Année de publication : 2022 Article en page(s) : p. 378-387 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniums quaternaires Caractérisation Colorants réactifs Essais dynamiques Hydroxyde de sodium L'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol. La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude. Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate. La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante. Résistance à l'abrasion Teinture -- Fibres textiles synthétiques Teinture sans sels Température Viscose Index. décimale : 667.3 Teinture et impression des tissus Résumé : The traditional dyeing process of reactive dyes requires a large amount of inorganic salts to accelerate the combination of dyes and textiles, which leads to substantially more water pollution. In this work, we used a quaternary ammonium-type cationic modifier, 3-chloro-2-hydroxypropyl trimethylammonium chloride (CHPTAC), to modify the viscose acetal fibre before the dyeing process. After the modification, reactive dyes were dyed without any inorganic salt. Then the fabric was finished with a commercial wet rubbing fastness enhancer, FM-8, to improve the colour fastness. The modified viscose acetal fibre was characterised by Fourier Transform–infrared spectroscopy and scanning electron microscopy. The results showed that viscose acetal fibre was modified successfully by CHPTAC and that the physical structure did not noticeably change following the modification. The optimum process was determined by establishing the ideal amount of modifier and the modification temperature, as well as the concentrations of sodium hydroxide and soda ash. The results show that the most suitable parameters were 80 g/L for the modifier dosage, a modification temperature of 70°C, 20 g/L of sodium hydroxide and 10 g/L of soda ash. The wet rubbing fastness was grade 4-5 after finishing and dyeing. The exhaustion percentage was significantly higher than that for traditional dyeing, and the K/S and dyeing uniformity were both higher than traditional salt dyeing. Note de contenu : - EXPERIMENTAL : Materials and instruments - Cationic modification of viscose - Dyeing and soaping - Rubbing fastness finishing - Performance testing - RESULTS AND DISCUSSION : Modification reaction - SEM of the modified fibre - Effect of the amount of CHPTAC on dyeing performance - Analysis of zeta potential on the surface of modified cotton fabric - Effect of CHPTAC dosage on the grafting ratio and dyeing properties - Effect of sodium hydroxide dosage on dyeing properties - Effect of the modification temperature on fabric dyeing performance - Effect of soda ash dosage on the dyeing properties of fabrics - Exhaustion percentage curve of fabric - Fabric fastness testing - Table 1 : Comparison of dyeing fastness data of salted and non-salt–dyed viscose fabrics - Table 2 : Comparison of dyeing fastness data of salted and non-salt–dyed viscose fabrics post-treatment DOI : https://doi.org/10.1111/cote.12598 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12598 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37890 [article]

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The study of imidazoles gemini surfactants as retarders for the dyeing of cationic dyes on polyacrylonitrile fabrics / Jiliang Cao in COLORATION TECHNOLOGY, Vol. 134, N° 2 (04/2018)  

[article]  inCOLORATION TECHNOLOGY > Vol. 134, N° 2 (04/2018) . - p. 111-116 Titre : The study of imidazoles gemini surfactants as retarders for the dyeing of cationic dyes on polyacrylonitrile fabrics Type de document : texte imprimé Auteurs : Jiliang Cao, Auteur ; Chunli Meng, Auteur ; Hong Zhao, Auteur Année de publication : 2018 Article en page(s) : p. 111-116 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu de méthylène Colorants cationiques Polyacrylonitrile Surfactants Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Alkyl imidazole cationic Gemini surfactants (AICGS) with various alkyl chain lengths were used as retarders for dyeing methylene blue (MB) on polyacrylonitrile (PAN) fabrics, with benzyldimethyldodecylammonium chloride (1227) surfactant as a comparison. The exhaustion (E%) of MB on PAN fabrics was investigated at varying surfactant concentrations and dyeing temperatures. Furthermore, kinetic studies on various retarders and 10‐4‐10 AICGS concentrations were carried out. It was found that the retarding dyeing effect of AICGS is stronger when compared with the 1227 surfactant. Moreover, as surfactant concentration increased or the dyeing temperature decreased, E% was reduced drastically. For kinetic studies, the dyeing rate constant increased with an increase in dyeing temperature and a decrease in 10‐4‐10 AICGS concentration, while half‐dyeing time was reversibly decreased. Note de contenu : - EXPERIMENTAL : Materials - Dyeing methods - Measurement - RESULTS AND DISCUSSION : Effect of surfactants concentration on the E% of MB on PAN fabrics - Effect of dyeing temperature on the E% of MB on PAN fabrics - Kinetic study of PAN fabrics - Retarder agent varieties - Concentration of 10-4-10 gemini surfactants - Dyeing kinetic parameters - Fastness properties DOI : 10.1111/cote.12325 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12325 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30315 [article]

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