[article]
| Titre : |
Characteristics of leather tanned with Nano-SIO2 |
| Type de document : |
texte imprimé |
| Auteurs : |
Haojun Fan, Auteur ; Biyu Peng, Auteur ; Qiang He, Auteur ; Bi Shi, Auteur ; Ling Li, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 22-28 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
A nano-precusor which can, in-situ, produce nano-SiO2 under particular triggering condition was introduced into leather to improve the hydrothermal stability. In order to elucidate the reaction of nano-SiO2 with proteinand how it influences the properties of the protein, collagen was used as a model in a detailed investigation. The results from FTIR (Infrared) indicated that two new chemical bonds arose 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 in the backbone of collagen. In a second bond, occurring at the same time as the condensation of silanol proceeds, the pendent hydroxyl groups of collagen may partly react with Si-OH and form a strong interaction between the organic and inorganic phases. These two chemical bonds seem to contribute to the leather's high hydrothermal stability. The size distribution of nano-SiO2 as determined by Atomic Force Microscopy is approximately 50-80 nm and there appeared to be no agglomeration. Organic-inorganic nano-hybrid can improve the hydrolysis stability of collagen efficiently in the presence of enzyme, acid, and alkali. When the bated pelt is treated with 0.3 wt % nano-SiO2 (based on bated pelt weight), the shrinkage temperature reached above 95°C. Although the mechanical properties of nano-SiO2 tanned leather are inferior to chromium tanned leather, other properties of nano-SiO2 tanned leather, such as yield, grain, fullness and softness together with washability are all superior to chromium tanned leather. |
| En ligne : |
https://drive.google.com/file/d/1ohLq2CUJ-Oo_mR-8noT-ldL7pN59s7c6/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4087 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 1 (01/2005) . - p. 22-28
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Characteristics of leather tanned with Nano-SIO2 in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 1 (01/2005)
