| Titre : |
Nano-SiO2-oxazolidine combination tannage-potential for chrome-free leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Lu Yan, Auteur ; Zhaoyang Luo, Auteur ; Haojun Fan, Auteur ; Yuansen Liu, Auteur ; Hui Li, Auteur ; Biyu Peng, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 252-257 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorimétrie
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Propriétés mécaniques
Dioxyde de silicium
Formulation (Génie chimique)
Liqueurs de tannage
Nanoparticules
Oxazolidine
Post-tannage
Tannage chrome free
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
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
A novel pickle-less combination tannage based on nano-SiO2 and oxazolidine as a substitute for chrome tanning has been developed. The size and distribution of nano-SiO2 in protein, the hydrothermal stability, the mechanical properties and the antifungal effect of final leather as well as the evaluation of eco-friendly characteristics of combination tannage were investigated.
Scanning Electric Microscope (SEM) analysis indicates that the distribution of nano-SiO2 in protein is even when the SiO2 concentration is lower than 5wt% (on bated pelt weight), and the size of SiO2 particles can be controlled to a range from 60 to 150nm. But when the SiO2 concentration exceeds 7wt%, most of the particles conglomerate together and the size of the SiO2 particles is larger than 400nm. Differential Scanning Calorimeter (DSC) study shows that the shrinkage temperature of final leather which is related to the content of nano-SiO2 is more than 95°C.
Compared to chrome tannage, leather tanned with oxazolidine-nano-SiO2 demonstrates a higher resistance to mould than conventional wet-blue. The latter incubated for 3 days began to grow mildew, whilst the oxazolidinenano-SiO2 tanned leather which was incubated for 6 days had no mildew, showing a fine antifungal effect. Environmental impact assessment shows that the developed process exhibits significant reduction in total solids (TS) and better biodegradability of organic compounds in the effluent when compared to chrome tanning. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Materials - Optimization of oxazolidine for pre-tanning - Oxazolidine-nano-SiO2 combination tanning - Conventional chrome tanning and post tanning process - Differential scanning calorimetry studies - Mechanical properties test of leather samples - Colour measurement - Scanning Electron Microscopic analysis - The antifungal effect of leather tanned with oxazolidine-nano-SiO2 - Analysis of spent tan liquor
- RESULTS AND DISCUSSION : Optimization of oxazolidine offer - The hydrothermal stability of nano-SiO2 and oxazolidine combination tanned leather - Mechanical properties of leather tanned with oxazolidine-nano-SiO2 - Colour measurement results - The influence of nano-SiO2 content on the size and distribution of SiO2 in protein - The antifungal effect of the oxazolidine and nano-SiO2 combination tanned leather - Environmental benefits
- Table 1 : Post tanning formulation for both combination tanned and chrome tanned leathers
- Table 2 : Effect of oxazolidine content on Ts of leather and the penetration time of nano-precursor
- Table 3 : Physical strngth of crust leathers tanned with chromium and oxazolidine-nano-SiO2
- Table 4 : Colour measurement of nano-SiO2 and oxazolidine combination tanned leather
- Table 5 : Spent tan liquor analysis of oxazolidine and nano-SiO2 combination tanning
- Table 6 : The relationship between BOD5/COD value and the biodegradability of an organic compound |
| En ligne : |
https://drive.google.com/file/d/1-m9OGj7gCA2RNzFBn1QzBzvadXsIobnO/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38995 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 6 (11-12/2008) . - p. 252-257
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Nano-SiO2-oxazolidine combination tannage-potential for chrome-free leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 6 (11-12/2008)
