| Titre : |
Gel-sol transitions of chrome tanned leather waste hydrolysate |
| Type de document : |
texte imprimé |
| Auteurs : |
F. Langmaier, Auteur ; M. Stibora, Auteur ; Karel Kolomaznik, Auteur |
| Année de publication : |
2001 |
| Article en page(s) : |
p. 100-105 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse thermique
Colles
Colloides
Cuirs et peaux -- Déchets -- Recyclage
Hydrolysat de collagène
Sol-gel, Procédé
Tannage au chrome
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The properties of gels of collagenous hydrolysates from enzyme treatment of chrome-tanned leather waste, were monitored with the use of the DSC technique. The temperatures at which gels melt, the energies of the gel—sol transitions (determined by use of the DSC technique) and the gel strength (in degrees Bloom) correspond to those of gels of the qualitative class 9—10, as specified by the National Association of Glue Manufacturers. Due to the lower mean molecular weight of the hydrolysates (when compared with commercially available glues) and the wider molecular weight distribution. hydrolysed gels from enzyme hydrolysates (hydrolysis times less than 3 h) are used at concentrations approximately three times higher than is usual with commercially available glues of the above—mentioned quality.
Glues of this qualitative class are often used in industry in concentrations of 50/ and higher and thus the higher concentration of hydrolysates from chrome-tanned leather waste will not represent an obstacle when they are used in a similar way. |
| Note de contenu : |
- Material used and techniques : Starting materials - Technique
- Table 1 : Characteristics of original materials
- Table 2 : Characteristic parameters of gels and DSC curves of their gel—sol transitions
- Table 3 : Results of the analysis ol’ scatter of energies of the gel—sol transitions (cf. Table II)
- Table 4 : Results of the analysis of gel strength scatter (Bloom)
- Appendix : The technology of enzymatic chrome leather waste decomposition |
| En ligne : |
https://drive.google.com/file/d/1__AZx2sEjxM4JTnVaRMM4RN6o_UWi8Hx/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40364 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 3 (05-06/2001) . - p. 100-105
Aller sur edunet
Accueil
Gel-sol transitions of chrome tanned leather waste hydrolysate in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 3 (05-06/2001)
