| Titre : |
Construction of a chrome-free tanning system based on highly-oxidized starch–zirconium complexes |
| Type de document : |
texte imprimé |
| Auteurs : |
Yue Yu, Auteur ; Hui Wang, Auteur ; Ya-Nan Wang, Auteur ; Jianfei Zhou, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 87-95 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Amidons
Biodégradation
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 physiques
Eaux usées -- Analyse
Granulométrie
Post-tannage
Taille des particules
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
Zirconium
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Chrome-free leather manufacture is one of the major focuses of leather industry. In this work, a chrome-free tanning system based on highly-oxidized starch–zirconium complexes (HOS–Zr) was constructed. Particle size and charge properties analyses revealed that the small size (2.5 nm) and the low cationic species content (45.1%) of HOS–Zr at low pH facilitated its uniform penetration in leather at the initial stage of tanning, and the large size (89–169 nm) and the high cationic species content (77.5%) of HOS–Zr after basification contributed to its stable crosslinking between collagen fibers. A 3% HOS–Zr offer (based on the weight of ZrO2) imparted wet white with sufficient tanning effect. The physical properties of HOS–Zr crust leather were remarkably better than those of lactic acid–zirconium crust leather and were comparable to those of chrome crust leather. Wastewater in HOS–Zr tanning system showed a reduction in TOC load by 40.0% and higher biodegradability compared with chrome tanning system. As a result, this work provided a practical and sustainable approach to eliminate chrome in leather manufacture. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Optimization of HOS-Zr tanning system - Particle size analysis - Charge properties analysis - Tanning trials
- RESULTS AND DISCUSSION : Optimization of HOS-Zr-tanning system - Particle soze of HOS-Zr - Charge properties of Zr complexes - Comprehensive evaluation of the tanning performance of HOS-Zr
- Table 1 : La-Zr and HOS-Zr tanning process
- Table 2 : conventional chrome tanning process
- Table 3 : Post-tanning process
- Table 4 : Properties of tanned leathers
- Table 5 : Physical properties o fcrust leathers
- Table 6 : Pollution loads in tanning and post-tanning wastewaters (unit: kg/ton of pickled hide)
- Table 7 : Biodegradability of tanning and post-tanning wastewaters |
| En ligne : |
https://drive.google.com/file/d/1VmQIPtNQ6vZECS63DGWb4kMJcZEwDYNN/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37599 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 3 (03/2022) . - p. 87-95
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Construction of a chrome-free tanning system based on highly-oxidized starch–zirconium complexes in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 3 (03/2022)
