| Titre : |
Tanning with natural polymeric materials. Part 2 : Efficiency of dialdehyde sodium alginate as a bi-functional cross-linking agent |
| Type de document : |
texte imprimé |
| Année de publication : |
2008 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alginate de sodium dialdéhyde
Cuirs et peaux
Cuirs et peaux -- Propriétés mécaniques
Gonflement (physique)
Mesure
Réticulants
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The physical properties of collagen are profoundly influenced by the method and extent of cross-linking. Dialdehyde sodium alginate (DSA) at various oxidation levels was used to cross-link collagen. The number of covalent cross-links introduced in collagen by DSA has been quantified by calculating cross-linking density, swelling ratio, thermo-mechanical properties and stress-strain characteristics. 92% oxidised DSA (DSA-92) gave the maximum number of cross-links at pH8 compared to other versions. The number of cross-links has been found to increase with increase in oxidation of DSA and dialdehyde functionality. The spatial orientation of amino acid side chain residue during crosslinking of collagen plays an important role in determining the cross-linking density and consequent physical properties of the collagen matrix. |
| Note de contenu : |
- EXPERIMENTAL : Reagents and chemicals - Preparation of collagen membranes - Cross-linking conditions - Cross-linking density measurements - Hydrothermal isometric tension experiments - Swelling ratio - Measurement of stress-strain characteristics
- RESULTS AND DISCUSSION : Cross-linking density of DSA treated collagen samples - Thermo-mechanical properties of DSA cross-linked collagen - Swelling ratio of DSA cross-linked collagen - Stress-strain behaviour of the DSA cross-linked collagen
- Table 1 : Conditions for cross-linking collagen with DSA and GTA
- Table 2 : Number of cross-links and average molecular weight of the chain between cross-links of control and cross-linked collagen membranes
- Table 3 : Hydrothermal isometric tension, tensile strength and elongation of control and cross-linked collagen membranes |
| En ligne : |
https://drive.google.com/file/d/1yzs3dv-batk-jLi89FXpeyI_vsu-5BJ_/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38932 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 2 (03-04/2008)
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Tanning with natural polymeric materials. Part 2 : Efficiency of dialdehyde sodium alginate as a bi-functional cross-linking agent in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 2 (03-04/2008)
