| Titre : |
Cleaner processing of bovine wet-white : synthesis and application of a novel chrome-free tanning agent based on an amphoteric organic compound |
| Type de document : |
texte imprimé |
| Auteurs : |
Luo Jianxun, Auteur ; Feng Yanjuan, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 190-196 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents de tannage
Composés organiques -- Synthèse
Cuirs et peaux de bovins
Polyaddition
Température de retrait
Wet-white (tannage)
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Wet-white processing is an effective method to reduce or get rid of chrome pollution. However; the current chrome-free tanning agents can't meet the needs both of the market and of environmental protection regarding the aspects of shrinkage temperature, the state of wet-white tanned and clean production. A novel chrome-free tanning agent was synthesized through radical polymerization by employing acrolein and diallyl dimethyl ammonium chloride. Based on this navel chrome-free agent, its characteristics, application and the cleaner processing of bovine wet-white leather were studied in this thesis. The results show that the novel chrome-free agent has the structure of an amphoteric organic compound, appropriate molecular weight and exhibits good tanning properties. The optimal tanning conditions are as follows : the pH value of pickled hide is adjusted to 6.0-7.0, the consumption
of the novel' chrome-free agent is based on 150% times of the weight of pickle and the pelt is
directly tanned for 5 hours at room temperature, then the pH value of the float is adjusted to 7.0-8.0, 100% hot water is added to raise the temperature to 35C-40°C and the leather is tanned for a further 5 hours. The shrinkage temperature of the leather tanned by the novel chrome-free agent can achieve 86°C or se, and the leather has fine grain and good feel. Based on the performance of the navel chrome-free tanning agent and its tannage, the bated pelt could be tanned directly by adjusting the balance of the formulation, which will greatly reduce the content of chloride ion in the effluent so as to contribute to the clean production of feather. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Preparation and testing of the molecular weight of the novel chrome-free tanning agent SL - Optimization of the penetration pH of SL - Optimization of the cross-linking pH of SL - Optimization of the SL offer in tanning - Optimization of the penetration time of SL - Optimization of the temperature and running time of SL - Contrast experiment between tanning bated pelt and pickled pelt and fatliquoring
- RESULTS AND DISCUSSION : Analysis of the basic chemical structure of SL and its characteristics |
| En ligne : |
https://drive.google.com/file/d/1utiqddeERsCxPjvYUjl9AaIoYh9oNCQs/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24561 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 4 (07-08/2015) . - p. 190-196
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Cleaner processing of bovine wet-white : synthesis and application of a novel chrome-free tanning agent based on an amphoteric organic compound in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 4 (07-08/2015)
