| Titre : |
Viscosity properties of collagen solutions : influence of pH, salt type and salt concentration |
| Type de document : |
texte imprimé |
| Auteurs : |
Kai Lei, Auteur ; Yulong Li, Auteur ; Congde Qiao, Auteur ; Tianduo Li, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 137-140 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Collagène
Cuirs et peaux
Lumière -- Diffusion
Mesure
pH
Solutions (chimie)
Viscosité
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
In this work, the effects of pH, salt type, and salt concentration on the viscosity behaviour of collagen solutions were investigated by a photoelectric viscometer. The results show that the viscosity behaviour as polyelectrolytes or polyampholytes depended on the charge distribution on the polypeptide chains, which can be tuned by the value of pH of the collagen solution. The intrinsic viscosity of collagen in Na2SO4 solution at pH2.0 first decreases and then increases with increasing salt concentration, while a monotonic decrease of the intrinsic viscosity of collagen is observed in NaCl solution. The intrinsic viscosity of collagen in Cr(OH)SO4 solution at pH4.0 is found to be increased first and then decreased with an increase in salt concentration, whereas an opposite trend is observed in same solution at pH2.0. We suggest that the complicated viscosity behaviour of collagen solution is attributed to the comprehensive effects of shielding, overcharging and crosslinking caused by the introduction of the different counterions. In addition, the viscosity result is also confirmed by dynamic light scattering (DLS) experiment. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Viscosity measurements - Measurement of dynamic light scattering (DLS)
- RESULTS AND DISCUSSION : Effect of counterion valency on the intrinsic viscosity of collagen in salt solutions - Effect of pH on the intrinsic viscosity of collagen in Cr(OH)SO4 solutions - Effect of pH on the average hydrodynamic radius (Rh) of collagen in Cr(OH)SO4 solutions |
| En ligne : |
https://drive.google.com/file/d/1mHRj_sabaPR_JWSuEA8KzjGUOKEDncMx/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30794 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 3 (05-06/2018) . - p. 137-140
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