Chemical analysis and thermal stability of African mahogany (Khaya ivorensis A. Chev) condensed tannins
| Autor: | Rodrigue Safou Tchiama, Léo Leroyer, Bertrand Charrier, Starlin Peguy Engozogho Anris, Arsène Bikoro Bi Athomo, Antonio Pizzi |
|---|---|
| Přispěvatelé: | Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Ecole Normale Supérieure de l'Enseignement Technique [Rabat] (ENSET), Université Mohammed V, Université des Sciences et Techniques de Masuku [Franceville, Gabon] (USTM), Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Université de Lorraine (UL), Australian National Botanic Gardens |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
bark. DSC. FTIR. heartwood. Khaya ivorensis. MALDI-TOF. sapwood. Stiasny number. tannins. TGA biology Chemistry Industrial chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 15. Life on land biology.organism_classification 01 natural sciences Biomaterials [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.POLY]Chemical Sciences/Polymers Proanthocyanidin [CHIM.ANAL]Chemical Sciences/Analytical chemistry 010608 biotechnology visual_art visual_art.visual_art_medium Organic chemistry Thermal stability Bark Khaya ivorensis 010606 plant biology & botany |
| Zdroj: | Holzforschung Holzforschung, De Gruyter, 2019, ⟨10.1515/hf-2019-0113⟩ |
| ISSN: | 0018-3830 1437-434X |
| Popis: | The forest policies of new Congo basin countries have increased the wood timber industry output since the year 2000. Thus, a high content of underutilized wood waste from sawmill, furniture and plywood industries is generated. Among them, Khaya ivorensis A. Chev bark, sapwood and heartwood account for the less valorized wood wastes. Therefore, an attempt was made to study the chemical variability and thermal stability of tannins extracted from the sapwood and heartwood by the acetone/water method (7:3, v:v); the potential recovery of these polyphenols for industrial applications was also aimed. Quantitative analysis pointed out that the heartwood was the most abundant in phenolic units, and a significant difference (P 0.05). These tannins were characterized by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry (MS) and Fourier transform infrared (FTIR) spectroscopy. Their chemical structures were fisitinidin- and gallocatechin-type units. No evidence of free cathechin moiety was found in these extracts. Moreover, oligomers up to seven tannin monomers free from glycosyl structures were found in the K. ivorensis condensed tannins. Moreover, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) pointed out good thermal stability of these hardwood species’ tannin. These findings could be useful for future valorizations of African mahogany wood wastes as source of tannins for chemistry or composite materials. |
| Databáze: | OpenAIRE |
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