| Titre : |
Use of ultrasound in soaking for improved efficiency |
| Type de document : |
texte imprimé |
| Auteurs : |
Venkatasubramanian Sivakumar, Auteur ; G. Swaminathan, Auteur ; P. G. Rao, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 249-251 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Bains de trempe -- Analyse
Bains de trempe -- Teneur en chlorure de sodium
Bains de trempe -- Teneur en solides
Cuirs et peaux de chèvres
Déchets -- Elimination
Peaux brutes -- Trempe
Peaux salées
Solides
Ultrasons
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The length of the soaking process plays a vital role in leather making; prolonged soaking may encourage putrefaction of the skin, thus there is a need to improve the efficiency of the soaking process. Power ultrasound has been employed with the aim of shortening process time.Two types of equipment were used, an ultrasonic cleaner (33 kHz) and an ultrasonic probe (20 kHz) in comparative experiments with static soaking. The efficiency of the soaking process was evaluated in terms of the removal of solids from wet-salted skin - a combination of salt, dirt, blood and soluble protein. We also studied the rate of water uptake of air-dried skins.
The results showed a 44% increase in solids removal by ultrasound in 1 hour soaking of wet salted goat skin. In the case of air-dried skins ultrasound reduced the soaking time by up to 75%. Analysis of the hydroxyproline content in the spent soak liquor indicates that the skin material is not adversely affected by ultrasound in soaking.
Efficiency of the soaking process has been evaluated from the removal of total solids from the wet-salted skin comprising salt, dirt, blood and soluble proteins. The rate of uptake of water in case of air-dried skins during the soaking process has also been studied ; the results show that soaking in the presence of ultrasound could reduce the soaking time by up to 75%. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Ultrasonic set-up
- MATERIALS AND METHODS : Soaking of salted goat skin - Soaking of air-dried skin (based on air-dried skin weight)
- RESULTS AND DISCUSSION : Soaking of salted goat skin - Hydroxy proline content in spent liquor - Mechanisms for the improvement with ultrasound
- Table 1 : Total solids content in the spent liquor after 1 hour soaking of wetsalted goat skin both with and without ultrasound
- Table 2 : Sodium chloride content in the spent liquor after 1 hour soaking of wet-salted goat skin both with and without ultrasound
- Table 3 : Hydroxy proline analysis of spent soak, (Ultrasonic probe: 80W) at 30°C
- Table 4 : The effect of ultrasound (Ultrasonic probe: 100W) on water uptake in the soaking of air-dried goat skin |
| En ligne : |
https://drive.google.com/file/d/1gw-s2geYB2ZtGYH0KL2qhA59Q0FQQvpP/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39618 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 249-251
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Use of ultrasound in soaking for improved efficiency in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
