| Titre : |
Preparation of lignosulfonate reduced chrome tanning agent and its tanning effect |
| Type de document : |
texte imprimé |
| Auteurs : |
Peng Zhou, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 158-164 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chrome hexavalent
Lignosulfonate
Réduction (chimie)
Tannage au chrome
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Lignosulfate (LGS) is a major by-product of pulping industry, generated in a huge amount each year. In this research, LGS was used as a reducing agent to reduce Cr (VI) to Cr (III) so that the LGS reduced chrome tanning agent (Cr-LGS) was prepared. It was found that the optimal mass ration of LGS, dichromate and concentrated sulphuric acid was 0.7:1.0:1.0 for the preparation reaction. The LGS was degraded during the reaction while some functional groups, such as carboxyl, were derived. These structural changes in LGS made the Cr-LGS exhibit a satisfactory self-making effect and thus possess good alkali resistance. Tanning experiments indicated that Cr-LGS achieved a high shrinkage temperature for wet-blue (Ts=118°C, Cr2O3 offer=1.5 %). Compared with the leather tanned by commercial chrome tanning agent, the Cr-LGS tanned leather exhibited greater tensile and tear strengths with improved fullness and tightness. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Methods - Characterization of Cr-LGS - Tanning trials and evaluation of wet-blue leather - Scanning electron microscope analysis - Strength determination of crust leather.
-RESULTS AND DISCUSSION : Effect of mass ratio of LGS/dichromate on property of tanning liquor - The change of LGS structure after reaction and its effect on tanning properties - General evaluation of wet-blue leather - Mechanical properties of crust leather. |
| En ligne : |
https://drive.google.com/file/d/1hcN-Gfz-oLaWfVVfKn7yfbz4IPYv3V-O/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11859 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 4 (07-08/2011) . - p. 158-164
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