[article]
| Titre : |
Studies on the removal of inter-fibrillary materials. Part II : removal of protein, proteoglycan and glycosoaminoglycans from biobased pre-tanning process |
| Type de document : |
texte imprimé |
| Auteurs : |
Balaraman Madhan, Auteur ; M. Dineshkumar, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur |
| Année de publication : |
2010 |
| Article en page(s) : |
p. 181-188 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Eco-concerns are forcing the leather industry to shift itself from chemical based processing to bio-processing. The use of enzymes for unhairing and bating has been long established and well reported ; but the use of a-amylase for fiber opening is a recent development, which advocates the complete elimination of lime. Though the bio-based fiber opening process is established to be an eco-friendly alternative, it is essential to establish its effectiveness versus the conventional liming process by more objective methods. Hence in this work an attempt has been made for quantitative analysis or interfibrillary materials viz., proteins, proteoglycans and glycosoaminoglycans (GAGs) released from the skin matrix by the use of complete enzyme based beamhouse process, especially the effect of a-amylase in beamhouse processes. It is observed that treatment of 2 % a-amylase for a time period of 180 min is sufficient for the removal of optimum amount of inter-fibrillary materials especially, proteoglycans. Matched pair comparison of experimental bio-based processing has been made with conventional lime base processing and it is observed that the removal of proteoglycans were comparable in both these processes. Also, the crust leathers processed from the matched pair beamhouse processes were compared for their organoleptic and strength characteristics. Both experimental bio-processed leather and conventionnally processed control leather were observed to be comparable. THis work further authenticates that a completely bio-based beamhouse process is not only eco-friendly but also results in a similar effect on the removal of inter-fibrillary material compared to conventional lime based process. |
| Note de contenu : |
EXPERIMENTAL : Materials / Effect of duration of a-amylase treatment during fiber opening process / Effect of washing after fiber opening on the release of proteins, proteoglycans and GAGs / Influence of varying percentage of a-amylase on the removal of proteoglycans from beamhouse bioproces method / Matched pair comparison on the removal of protein, proteoglycans and GAGs from conventional and experimental process / physical testing and hand evaluation.
RESULTS AND DISCUSSION : Effect of duration of a-amylase treatment on the removal of proteoglycan / Removal of protein, proteoglycan and GAGs : Influence of washing (time) after a-amylase based fiber opening / Influence of varying percentage of a-amylase on the removal of interfibrillary material and physical properties of the leathers / Matched pair comparison on the removal of protein, proteoglycans and GAGs from conventional and experimental process. |
| En ligne : |
https://drive.google.com/file/d/1LWSav9X8M8LRJUZiSjfGY77h3htB5rUO/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9453 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 6 (06/2010) . - p. 181-188
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