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Adsorption and UV protection properties of the extract from honeysuckle onto wool / Sha-Sha Sun in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4217–4224 Titre : Adsorption and UV protection properties of the extract from honeysuckle onto wool Type de document : texte imprimé Auteurs : Sha-Sha Sun, Auteur ; Ren-Cheng Tang, Auteur Année de publication : 2011 Article en page(s) : pp. 4217–4224 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Adsorption Résumé : The adsorption and UV-protection properties of water-extract from honeysuckle whose main ingredient is chlorogenic acid onto wool were studied. The effect of initial pH on the adsorption was investigated, and the extent of adsorption was found to increase with decreasing pH in the range 2−7. Four kinetic equations, namely pseudo-first-order, pseudo-second-order, Elvoich, and intraparticle diffusion equations were employed to investigate the adsorption rates. The pseudo-second-order model provided the best fit to the experimental data and was indicated with the activation energy of 47.91 kJ mol−1. The equilibrium adsorption data were fitted by Freundlich, Langmuir, Redlich−Peterson, and Langmuir−Nernst isotherm models. The adsorption behavior accorded with Redlich−Peterson and Langmuir−Nernst models well. The honeysuckle extract showed good build-up properties, and the UV transmittance in the range of UVA and UVB of wool treated with honeysuckle extract decreased obviously while the ultraviolet protection factors increased. The extract of honeysuckle may be developed as a natural UV-absorbing agent applied to wool finishing. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101505q [article] Adsorption and UV protection properties of the extract from honeysuckle onto wool [texte imprimé] / Sha-Sha Sun, Auteur ; Ren-Cheng Tang, Auteur . - 2011 . - pp. 4217–4224. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4217–4224 Mots-clés : Adsorption Résumé : The adsorption and UV-protection properties of water-extract from honeysuckle whose main ingredient is chlorogenic acid onto wool were studied. The effect of initial pH on the adsorption was investigated, and the extent of adsorption was found to increase with decreasing pH in the range 2−7. Four kinetic equations, namely pseudo-first-order, pseudo-second-order, Elvoich, and intraparticle diffusion equations were employed to investigate the adsorption rates. The pseudo-second-order model provided the best fit to the experimental data and was indicated with the activation energy of 47.91 kJ mol−1. The equilibrium adsorption data were fitted by Freundlich, Langmuir, Redlich−Peterson, and Langmuir−Nernst isotherm models. The adsorption behavior accorded with Redlich−Peterson and Langmuir−Nernst models well. The honeysuckle extract showed good build-up properties, and the UV transmittance in the range of UVA and UVB of wool treated with honeysuckle extract decreased obviously while the ultraviolet protection factors increased. The extract of honeysuckle may be developed as a natural UV-absorbing agent applied to wool finishing. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101505q

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]  in Industrial & 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