| Titre : |
Tanning characteristics and tanning mechanism of nano-SiO2 |
| Type de document : |
texte imprimé |
| Auteurs : |
Haojun Fan, Auteur ; Bi Shi, Auteur ; Qiang He, Auteur ; Biyu Peng, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 139-142 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dioxyde de silicium
Liaisons chimiques
Nanoparticules
Stabilité hydrothermale
Taille des particules
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
A nano-precursor which can, in situ, produce nano-SiO2 under particular triggering conditions was introduced into leather to improve the hydrothermal stability. In order to elucidate the reaction of nano-SiO2 with protein and how it influences the properties of the protein, collagen was used as a model in detailed investigations. The result from FTIR indicated that two new chemical bondings occurred during the formation of the organic/inorganic nano-hybrid. One appears to be the reaction between nano-SiO2 formed in-situ by the hydrolysis of tetraethoxy silane and the —C=N— groups of arginine, histidine and tryptophane on the collagen backbone. In a second bonding, occurring at the same time as the condensation reaction of silanol proceeds, the pendent hydroxyl groups of collagen may partly react with Si—OH and form a strong interreaction between the organic and inorganic phases. These two chemical bonds seem to contribute to the leather’s high hydrothermal stability. AFM (atomic force microscopy) was used to determine the size and scale of nano-SiO2 particles in the protein. The size distribution is approx. 50 - 80 nm and there appeared to be no agglutination. When the bated pelt is treated with 0.2% or 0.3 wt% nano-SiO2 (based on bated pelt weight) the shrinkage temperature is raised from 68°C to 86.9°C and 95.4°C respectively -nano-SiO2 is thus shown to be a viable tannage. |
| Note de contenu : |
- EXPERIMENT DETAILS AND INSTRUMENTS : Preparation of nano-precursor - Preparations of protein-SiO2 organic-inorganic nano-hybrid - Tannage of leather - Instruments
- RESULTS AND DISCUSSION : Tanning mechanism of nano-SiO2 - Inorganic particle size and its distribution in protein - Hydrothermal stability of leather tanned with nano- SiO2 - Other characteristics of tanning
- Table 1 : Effect of pH SiO2 content on size of SiO2 at 35°C |
| En ligne : |
https://drive.google.com/file/d/1Ld_2TmQvqMG1mK9w-sJJMBOGsehqIj7s/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39626 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 4 (07-08/2004) . - p. 139-142
Aller sur edunet
Accueil
Tanning characteristics and tanning mechanism of nano-SiO2 in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 4 (07-08/2004)
