| Titre : |
Haematoxylin sorption onto yak hair : kinetic and thermodynamic studies |
| Type de document : |
texte imprimé |
| Auteurs : |
Lihong Gao, Auteur ; Haiyan Gao, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 21-26 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cheveux -- Teinture
Cinétique chimique
Colorants -- Absorption
Colorants -- Adsorption
Cuir et peau de Yak
Hématoxyline
Produits capillaires
Système pileux
Thermochimie
Thermodynamique
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
The kinetic and thermodynamic behaviours of haematoxylin sorption onto yak hair as a model system were investigated. It was found that the sorption kinetics of haematoxylin on hair followed a pseudo-second-order kinetic model. The equilibrium sorption capacity increased as the temperature increased from 303 to 313 K, but dropped gradually as the temperature increased beyond 313 K. The maximum equilibrium sorption capacity was 24.04 mg g?1 at T = 313 K. Meanwhile, the sorption isotherm data were ingood agreement with the Freundlich isotherm, presenting high coefficients (R2 > 0.99). The free energy change (?G), enthalpy change (?H), and entropy change (?S) terms for haematoxylin dyeing were also determined, the negative values of ?G and ?H obtained indicated that the haematoxylin dye sorption process is a spontaneous and an exothermic one. Also, positive values of ?S showed an increase in disorder of the system of haematoxylin sorption onto hair. Haematoxylin could be a good candidate as a natural green dye for hair fibre. |
| DOI : |
10.1111/cote.12061 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12061 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20354 |
in COLORATION TECHNOLOGY > Vol. 130, N° 1 (02/2014) . - p. 21-26
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