| Titre : |
Ultrasound assisted enhancement in wattle bark (Acacia Mollissima) vegetable tanning extraction for leather processing |
| Type de document : |
texte imprimé |
| Auteurs : |
Venkatasubramanian Sivakumar, Auteur ; G. Swaminathan ; P. Srinandini ; V. Shriram ; J. Jayapriya, Auteur |
| Année de publication : |
2009 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuirs et peaux
Tannage
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
This paper analyzes the effect of ultrasound on a batch wattle bark tannin extraction process. Extraction from wattle bark presents a unique case of a two-component system in the form of condensed tannins and non-tannins. Hence, quantitative analysis of tannin content in the extract by spectrophotometery as well as total extracts analysis has been performed. The influence of various process parameters such as ultrasonic power, time, agitation and temperature on extraction has been studied. The results show significant 2-3 and 1.2-1.7 fold improvement respectively for total extract and tannin content due to the use of ultrasound 40-120 W as compared to control at 30°C suggesting mass transfer enhancement in leaching of strongly bound tannins from wattle bark due to ultrasound. The results indicate total extract and tannins obtained in ultrasonic process (80 W), devoid of external heating is better than control at 30°C. Better total extraction and comparable tannin content obtained using ultrasound, 120 W when compared to control at 60°C. Efficacy of tannin extract has been analyzed which indicates significant improvement in rate of tannin uptake for ultrasonic extract as compared to control extract by the bovine pelt. Therefore, the present study clearly indicates use of ultrasond in wattle tannin extraction is a viable enhancement with added advantages even dispensing with external heating. |
| En ligne : |
https://drive.google.com/file/d/1SVkD-hx9VgcIZye6wptdeVMBzrgq1YDQ/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6386 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 11 (11/2009)
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