| Titre : |
Mapping tear, strength and collagen fibril orientation in bovine, ovine and cervine hides and skins |
| Type de document : |
texte imprimé |
| Auteurs : |
S. J. Kelly, Auteur ; Richard L. Edmonds, Auteur ; Sue M. Cooper, Auteur ; Katie H. Sizeland, Auteur ; Hannah C. Wells, Auteur ; T. Ryan, Auteur ; Nigel Kirby, Auteur ; A. Hawley, Auteur ; S. T. Mudie, Auteur ; Richard G. Haverkamp, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 1-11 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Cuirs et peaux de cervidés
Cuirs et peaux de moutons
Diffusion aux petits angles
Distribution et orientation des fibres
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
Résistance à la déchirure
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Leather is a natural and variable material. The variation in strength has previously been shown to be due in part to the collagen fibril orientation. However, the extent of variation in strength and orientation over a skin/hide is not well established. Synchrotron small angle X-ray scattering is used to measure collagen fibril orientation (O) and orientation index (OI). Tear strength is measured in two orthogonal directions across ovine and cervine skins and bovine hides. Average normalized strengths varied between species with cervine leathers having the greatest overall strength followed by bovine then ovine leathers. Ovine had the greatest variability in strength across the skin. There were no obvious regions of generally stronger or weaker skin within individual skins or hides. The predominant collagen fibril direction was perpendicular to the backbone of all species, with the greatest perpendicular alignment in ovine followed by cervine. Collagen fibril orientation in leathers made from of ovine, bovine and cervine skins have been analyzed quantitatively and in detail. Findings suggest an unpredictable variability in collagen arrangements within each species but a notable difference in strength between species. |
| Note de contenu : |
- METHODS : Leathers - Test samples - Tear strength - Small angle X-ray scattering (SAXS) - Orientation and orientation index - Samples
- RESULTS : Tear strength - SAXS measurements - Variation of O in the OSP grid square sample - Orientation index - Orientation - Correlation between O and tear strength - Difference between belly and back |
| En ligne : |
https://drive.google.com/file/d/18J4tLzzVaEGSbu3Mx6EnI4zz0Ct7Kl_y/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29744 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 1 (01/2018) . - p. 1-11
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