Adsorption isotherms and mordant dyeing properties of tea polyphenols on wool, silk, and nylon / Ren-Cheng Tang in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 8894–8901 Titre : Adsorption isotherms and mordant dyeing properties of tea polyphenols on wool, silk, and nylon Type de document : texte imprimé Auteurs : Ren-Cheng Tang, Auteur ; Hui Tang, Auteur ; Cheng Yang, Auteur Année de publication : 2010 Article en page(s) : pp. 8894–8901 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Adsorption polyphenols Isotherms Résumé : The adsorption behaviors of tea polyphenols (TP) on wool, silk, and nylon at pH 4.0 were investigated. The Langmuir−Nernst model had the best fitting to the adsorption isotherms. The analysis of adsorption mechanism suggested that the hydrogen bonding and electrostatic interactions operating between TP and fibers contribute to Langmuir adsorption, whereas other interactions (hydrophobic interaction and van der Waals forces) contribute to Nernst partition adsorption. Langmuir adsorption had greater contribution to total adsorption of TP on nylon, whereas partition adsorption imparted greater influence to TP adsorption on silk. In terms of the mordant dyeing of TP, silk and wool displayed much deeper color than nylon due to their higher content of the functional groups having the complex-forming ability, although they had lower adsorption capability for TP than nylon. The colors of the dyed fabrics mordanted with different metallic salts as well as their depth, were greatly dependent on the chemical nature of mordants and fibers, the metal ion−TP−fiber complex-forming ability, and the related complex structure. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100052b [article] Adsorption isotherms and mordant dyeing properties of tea polyphenols on wool, silk, and nylon [texte imprimé] / Ren-Cheng Tang, Auteur ; Hui Tang, Auteur ; Cheng Yang, Auteur . - 2010 . - pp. 8894–8901. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 8894–8901 Mots-clés : Adsorption polyphenols Isotherms Résumé : The adsorption behaviors of tea polyphenols (TP) on wool, silk, and nylon at pH 4.0 were investigated. The Langmuir−Nernst model had the best fitting to the adsorption isotherms. The analysis of adsorption mechanism suggested that the hydrogen bonding and electrostatic interactions operating between TP and fibers contribute to Langmuir adsorption, whereas other interactions (hydrophobic interaction and van der Waals forces) contribute to Nernst partition adsorption. Langmuir adsorption had greater contribution to total adsorption of TP on nylon, whereas partition adsorption imparted greater influence to TP adsorption on silk. In terms of the mordant dyeing of TP, silk and wool displayed much deeper color than nylon due to their higher content of the functional groups having the complex-forming ability, although they had lower adsorption capability for TP than nylon. The colors of the dyed fabrics mordanted with different metallic salts as well as their depth, were greatly dependent on the chemical nature of mordants and fibers, the metal ion−TP−fiber complex-forming ability, and the related complex structure. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100052b

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