| Titre : |
Inside into understanding incorporation of glycidoxypropyltrimethoxysilane for improving hydrothermal stability and porous structure of silicic acid tanned leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Zetian Zhang, Auteur ; Jun Liu, Auteur ; Junchao Wang, Auteur ; Zhengjun Li, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 300-312 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
3-Glycidoxypropyltrimethoxysilane
Cuirs et peaux -- Analyse
Dénaturation (chimie)
Essais accélérés (technologie)
Porosité
Stabilité hydrothermale
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Tannage synthétique
Température de retrait
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Tanning with silicic acid, a kind of silicon-containing materials, is considered as a more environmentally benign process; however, the obtained leather would become stiff and brittle during storage in spite of possessing acceptable shrinkage temperature (Ts). Herein, we incorporated organosilicon material attaching silicon atoms with T linkage structure (e.g. glycidoxypropyltrimethoxysilane, GPTMS) in the leather-making process to investigate hydrothermal stability and porous structure, in particular their variation along with different storage time, through Ts determination, DSC analysis, SEM observation and SEM-EDS test. The results confirmed that the introduction of GPTMS stabilized properties of the resultant leather during accelerated ageing process, which may be ascribed to that GPTMS could prevent silicon hydroxyl groups existing in collagen fiber matrix from further condensation. Besides, the tanning mechanism of chrome-free tanning agent based on silicon materials such as silicic acid and GPTMS was investigated preliminarily by means of FT-IR and XPS analysis, indicating hydrogen bonds between silicon hydroxyl groups and amino groups in collagen molecules, and the covalent bonding formed by epoxy group of GPTMS and carboxyl groups of collagen fibers are beneficial to improvement of the properties of silicon-based materials tanned leather. These findings provide an effective and promising strategy to control condensation of silicon hydroxyl groups, and are of great significance to the development of a chrome-free tanning technology based on silicon materials. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of the silicic acid solution - Tanning process and accelerated ageing test of leather samples selection of tanning conditions - Addition of GPTMS and accelerated aging test - Test of the shrinkage temperature - Test of the denaturation temperature - Measurement of the total porosity - SEM observation and SEM-EDS analysis - FT-IR measurement - XPS measurement
- RESULTS AND DISCUSSION : Optimization of parameters in silicic acid tanning process - Effect of GPTMS on stability and porous structure of leather - Effect of GPTMS and accelerated ageing on stability of leather - Effect of GPTMS and accelerated ageing on porous structure of leather - Preliminary research of tanning mechanism |
| En ligne : |
https://drive.google.com/file/d/1CaTbsbMP4-jjhiCVqGzSvRDqH_qdpHej/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32790 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 8 (08/2019) . - p. 300-312
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Inside into understanding incorporation of glycidoxypropyltrimethoxysilane for improving hydrothermal stability and porous structure of silicic acid tanned leather in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 8 (08/2019)
