| Titre : |
Extract of trema orientalis (L.) Stem Bark : A potential source of environmentally friendly tanning agent for leather industry |
| Type de document : |
texte imprimé |
| Auteurs : |
Murshid Jaman Chowdhury, Auteur ; Abdur Razzaq, Auteur ; Imran Biswas, Auteur ; Ariful Hai Quadery, Auteur ; Tushar Uddin, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 28-34 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents de tannage
Caractérisation
Cuirs et peaux -- Analyse
Extraction (chimie)
Retannage
Tanins végétaux
Tannage végétal
Trema orientalisTrema orientalis est une espèce de plantes arborescentes. Elle appartient à la famille des Ulmaceae ou Celtidaceae selon la classification classique ou à celle des Cannabaceae selon la classification phylogénétique.
On le trouve en Afrique du Sud jusqu'en Afrique tropicale ainsi que dans les régions chaudes d'Asie. Il a été naturalisé à Hawaï.
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Researchers around the world are in continuous endeavor to develop environment friendly tanning agent due to adverse effect of conventionally used chromium during leather tanning. Recent trend of tanning is thus heading to chrome-free and greener chemical processing options. Vegetable tanning is an exoteric leather processing technique because of their lower pollution load on the environment. Considering the inadequacy and high costing for the commercialized tannins, development of alternative tannins from locally available plants and their characterizations are important. In this research, the stem barks of Trema Orientalis (L.) were extracted at different temperatures employing water solvent with or without additives (sodium hydroxide or sodium sulphite) to attain phenolic-rich extractives. To ascertain appropriateness as a vegetable tanning agent, the obtained extracts were thereafter characterized in respect to yield, total phenolic content, tannin content and molecular structure. The extraction yield for all extracts improves and the quality remains nearly unchanged with temperature rising. The elevated concentration of chemical additives enhances the extraction yield but lessens the quality of extracts. In terms of extraction yield and the quality of extracts the best condition for extraction was discerned at 80°C with water solvent. This water extract has a decent extent of phenolic and tannin content of 266.13 mg Gallic acid equivalent/ gm of dry extract and 30.12 % respectively. The final extract exhibits excellent leather retanning tendency comparable to the commercial quebracho tannins. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Extraction process and yield of extract calculation - Total phenolic content determination - Determination of tannin content - Identification of tannin class by FT-IR spectroscopic method - Retanning process of leather - Characteristics of retanned leather
- RESULTS AND DISCUSSION : Extraction yield - Characterization of extract - Total phenolic content and tannin content - FT-IR analysis - Characterization of retanned leather
- Table 1 : Extraction yield and characteristics of T. Orientalis stem bark extracts and quebracho tannin
- Table 2 : Characterization of retanned leather |
| DOI : |
https://doi.org/10.34314/jalca.v117i1.4696 |
| En ligne : |
https://drive.google.com/file/d/1qJhz2H1tTtDzYmKke6Qlq9Ry3ElkGsb9/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37028 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 1 (01/2022) . - p. 28-34
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