Titre : |
Effect of sodium chloride on structure of collagen fiber network in pickling and tanning |
Type de document : |
texte imprimé |
Auteurs : |
Li Xinxin, Auteur ; Ya-Nan Wang, Auteur ; Jing Li, Auteur ; Bi Shi, Auteur |
Année de publication : |
2016 |
Article en page(s) : |
p. 230-237 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Chlorure de sodium Le chlorure de sodium est un composé chimique de formule NaCl. On l'appelle plus communément sel de table ou de cuisine, ou tout simplement sel dans le langage courant. C'est le principal produit dissous dans l'eau de mer ; on l'appelle alors sel marin.
On l'obtient : dans des marais salants par évaporation de l'eau de mer, dans des mines, par extraction du sel gemme (halite) ou en le synthétisant lors de réactions à hautes températures entre du dichlore (Cl2) et du sodium métallique (Na).
Le chlorure de sodium est utilisé dans l'industrie chimique pour produire du chlore, de la soude caustique et de l’hydrogène. Collagène Cuirs et peaux -- Analyse PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu. Porosité Surfaces -- Analyse Tannage organique Wet-white (tannage)
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Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
Tannery wastewater usually contains a high salinity due to the use of sodium chloride (NaCl) in curing and pickling. Although some no pickle tanning and salt-free pickling technologies were developed, few of them have been widely used due to relatively poor mechanical and bulk properties of the resultant leathers. Therefore, the role of NaCl in pickling and tanning should be investigated in the first place. In this study, bated pelts were pickled by salt-free pickling and conventional salt-assisted pickling processes, respectively, and then tanned by chrome tanning agent. The hierarchical structures of collagen fiber network of the pickled pelts and leathers were observed by optical microscope and SEM, while the porosity of leathers was measured. The results showed that the fiber bundles of the pelt pickled in the presence of NaCl were more sufficiently dispersed compared with those of salt-free pickled pelt. Both of the chrome tanned leathers had a regular arrangement of collagen fibers, but the leather with salt assisted pickling presented remarkably higher degree of fiber dispersion, as well as larger porosity. Moreover, the role of NaCl in organic tanning using an amphoteric organic tanning agent was investigated. The results also showed that the presence of NaCl in tanning could improve the opening up of collagen fiber network and the porosity of the leather. In general, NaCl used in leather processing presented a positive effect in consideration of leather quality. |
Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of pickled pelts - Preparation of tanned leathers (chrome tanned leather and TWT tanned leathers) - Histological staining - Scanning electron microscopy - BET surface area analysis - Capillary flow porometry - Measurement of porosity of pelt/leather
- RESULTS AND DISCUSSION : Effect of NaCl on the fibrous network in pickling - Effect of NaCl on the fibrous network in chrome tanning - Effect of NaCl on the fibrous network in tanning with amphoteric organic tanning agent |
En ligne : |
https://drive.google.com/file/d/1BP0XLIpHij9jDQmZ5ZbP6TT2jZpnSGXs/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26440 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 6 (06/2016) . - p. 230-237