[article]
Titre : |
Penetration of the polyflavonoids and simple phenolics : a mechanistic investigation of vegetable tanning |
Type de document : |
texte imprimé |
Auteurs : |
Teng Bo, Auteur ; Jiacheng Wu, Auteur ; Wuyong Chen, Auteur |
Année de publication : |
2017 |
Article en page(s) : |
p. 420-427 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Analyse quantitative (chimie) Chromatographie en phase liquide à hautes performances Flavonoïdes Phénols Tannage végétal Tannage végétal -- Analyse
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Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
Mechanisms of tanning are the fundamental base for predicting and developing new tanning agents and technologies. However, many mechanistic questions remain for us, such as: How does the penetration happen? How do the phenolic compounds work individually? In this study, penetration processes of the tannin extracts were investigated with the Bayberry extract (prodelphenidins), the Larch extract (procyanidins) and the Acacia Mangium extract (prodelphenidin-procyanidin complexes) used as tanning agents. During the process, the tanning liquids were regularly sampled and the simple phenolics and polyflavonoids were quantified respectively with a Prussian blue assay, a conductivity analysis, an acid-butanol assay as well as a HPLC analysis. The results showed that, during tannin, the concentration of polyflavonoids in the tanning liquid decreased continuously. In contrast, for the simple phenolics, the concentration decreased at first and later increased. Therefore, penetration processes of the tannin extracts can be described as: in the beginning, both simple phenolics and polyflavonoids started to penetrate; then the simple phenolics completed their penetration first and reversibly bound with collagens; in the meantime, the polyflavonoids were still penetrating and gradually replacing those simple ones from collagen matrix; at the end of the tanning processes, most of the simple phenolics were replaced by the polyflavonoids, meanwhile they were migrated back into the tanning liquids. The results will provide valuable information to help understanding the mechanism of vegetable tanning. |
Note de contenu : |
- EXPERIMENTAL : Sample preparation - Prussian blue assay - Conductivity test - Acid-butanol assay - HPLC Analysis
- RESULTS AND DISCUSSION : The total phenolics in the tanning liquids - The simple phenolics in the tanning liquids - The polyflavonoids in the tanning liquids - The results of the HPLC analysis - The penetration process of the simple phenolics and the polyflavonoids |
En ligne : |
https://drive.google.com/file/d/12TJld_K4j2JVVhKQPVKHK9m1eTpim3mT/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29588 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 12 (12/2017) . - p. 420-427
[article]
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