| Titre : |
Rheological behaviour of alkali solubilized collagen from limed bovine split wastes |
| Type de document : |
texte imprimé |
| Auteurs : |
Chen Yihui, Auteur ; Li Guoyin, Auteur ; Jia Yun, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 195-199 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Bases (chimie)
Collagène
Collagène -- Solubilité
Cuirs et peaux -- Déchets
Cuirs et peaux de veaux
Rhéologie
Rhéométrie
Solutions (chimie)
Température
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The rheological behaviour of alkali solubilized collagen solutions (ASCS) from calf limed splits was modeled to investigate the effects of temperatures (25, 27.5, 30 and 32.5°C) and concentration (8, 10 and 15mg/m1) on its fluid type using viscometrical rheometry. ASCS were reconstructed by using a power-law mode) and exhibited the typical pseudoplastic behaviour with flow behaviour index values, n<1. n increased with increasing concentration but decreased with increasing temperature. The dynamic viscoelastic properties of ASCS were determined by means of oscillatory rheometry at different pH, concentrations and temperatures in the ranges 2.5 to 8, 5-15mg/nnl and 25-35°C, respectively. The values of storage modulus (G'), loss modulus (G") and complex viscosity (?*) decreased with increasing pH from 2.5 to 7, and then increased as pH increased further. Meanwhile, G', G", ?* and relaxation times increased with the increase of collagen concentration, but decreased with increasing temperature and behaved without regularity at 35°C. |
| Note de contenu : |
- EXPERIMENTAL METHODS : Preparation of ASC - Preparation of ASC solutions - Rheological characterization of ASC solutions - Modelling of fluid flow behaviour using power law
- RESULTS AND DISCUSSION : Model of fluid flow behaviour using power law - Effects of concentration on dynamic rheological properties - Effects of the pH of ASC solution on dynamic rheological properties - Effects of temperature on dynamic rheological properties |
| En ligne : |
https://drive.google.com/file/d/1hQTDRjuARXTTocj-_biEyARqmu88BR0e/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19567 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 5 (09-10/2013) . - p. 195-199
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