| Titre : |
Calorimetric and kinetic analysis of thermal behaviors of chrome-tanned collagen fibers using isoconversional and multivariate non-linear regression methods |
| Type de document : |
texte imprimé |
| Auteurs : |
Wentao Liu, Auteur ; Yuanzhi Zhang, Auteur ; Li Guoying, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 399-409 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Calorimétrie
Cinétique chimique
Collagène
Cuirs et peaux -- Analyse
Tannage au chrome
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
To further understand the thermal stability of collagen in hide and leather, the thermal denaturation behaviors of chrome-tanned collagen fibers were studied by non-isothermal differential scanning calorimetry (DSC) using isoconversional and multivariate non-linear regression (Multivar-NLR) methods. The differential (Friedman) and the integral (Ozawa-Flynn-Wall) isoconversional methods as well as the Multivar-NLR method showed that the denaturation (or shrinkage) process could be best described by a three-step model, in which a reversible reaction was followed by a rate-limited irreversible step. The simulation of thermal behaviors of collagen at different temperature conditions indicated that the denaturation kinetics could be approximated to a one-step irreversible reaction at low heating rates or temperatures. For the design of new chrome-free tanning systems, which can endow collagen with high enough thermostability, the decrease in the rate of the irreversible denaturation of collagen might be an important criterion as well, besides the increases in the denaturation (or shrinkage) temperature, enthalpy and effective activation energy. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of chrome-tanned collagen fibers - Differential scanning calorimetry (DSC)- Kinetic analysis - Isoconversional analysis - Multivar-NLR analysis - Simulation of thermal behaviors of chrome-tanned collagen fibers
- RESULTS AND DISCUSSION : Effects of heating rate and chrome-tanning on the thermal denaturation of collagen fibers - Isoconversional kinetic analysis - Multivar-NLR kinetic analysis - Simulation of thermal behaviors of chrome-tanned collagen fibers |
| En ligne : |
https://drive.google.com/file/d/1PSnXKXyQNIXY8P96zXT0rFmPNHCAYsO4/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29586 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 12 (12/2017) . - p. 399-409
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Calorimetric and kinetic analysis of thermal behaviors of chrome-tanned collagen fibers using isoconversional and multivariate non-linear regression methods in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 12 (12/2017)
