| Titre : |
The role of neutral salt for the hydrolysis and hierarchical structure of hide fiber in pickling |
| Type de document : |
texte imprimé |
| Auteurs : |
Cheng Haiming, Auteur ; Chen Min, Auteur ; Li Zhiqiang, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 117-124 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Collagène
Collagène -- Détérioration
Cuirs et peaux de bovins
Décapage
Hydrolyse
Sels
Solutions (chimie)
Sulfate de sodiumLe sulfate de sodium est un composé chimique courant formé d'un ion sulfate et de deux ions sodium. Lorsqu'il est anhydre, il prend l'apparence d'un solide cristallin blanc de formule chimique Na2SO4. La forme déca-hydratée, Na2SO4·10H2O, est connue sous le nom de sel de Glauber ou mirabilite. Parmi un grand nombre d'usages différents, les principales utilisations du sulfate de sodium concernent la fabrication des détergents et dans le procédé de Kraft de traitement de la pâte à papier. La moitié environ de la production mondiale provient de l'extraction de la forme naturelle décahydratée, et l'autre moitié de productions secondaires dans des procédés de l'industrie chimique.
Sulfurique, Acide
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Pickling process carried out for adjusting the skin to the desired pH for tanning, in which neutral salts were added to avoid skin fiber from the acid swelling. This research study aimed at investigating the contribution of neutral salt to the hydrolysis and the fibrous structure of collagen fiber in acid solutions. Collagen fiber and bovine hide in sulfuric acid solutions with sodium chloride or sodium sulfate were investigated. The total protein concentration in the solutions was determined. The hierarchical structures of bovine hide in different acid and neutral salt systems were investigated by optical microscope, TEM and SEM. This study suggested the importance of neutral salt for the hydrolysis and the dispersion of collagen fiber in pickling. It implied that the osmotic swelling by acid could not reach the inner scale of fibril. The decrease in mechanical properties for the leather tanned with salt free pickling may have been caused by osmotic swelling destroying the interactions among the fibril and fiber bundles. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Treatment of cattle hide in acid and salt solutions - Treatments of acid relaxed collagen fiber in acid and salt solutions - Histological investigation - Scanning electron microscopy (SEM) of un-hydrolyzed collagen fiber - TEM investigation
- RESULTS AND DISCUSSION : The effect of neutral salts to collagen hydrolysis in acid-neutral salt systems - The effect of neutral salts to the hierarchy structure of hide fiber in acid and neutral salt solutions |
| En ligne : |
https://drive.google.com/file/d/1sRTtKdi7Bfk1thh14HE8OyECMMzAOG2W/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21085 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 4 (04/2014) . - p. 117-124
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The role of neutral salt for the hydrolysis and hierarchical structure of hide fiber in pickling in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 4 (04/2014)
