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Etude de la valorisation du coproduit de scierie de Teck (Tectona grandis) par un procédé d’extraction en continu sous eau subcritique

Chavez Salgado, Lucero. Etude de la valorisation du coproduit de scierie de Teck (Tectona grandis) par un procédé d’extraction en continu sous eau subcritique. PhD, Sciences des Agroressources, Institut National Polytechnique de Toulouse, 2021

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Abstract

Tectona grandis L.f. (teak tree) is a tropical hardwood exceptionally appreciated in the timber market due to its outstanding performance and economic value. Among the main qualities are dimensional stability and decay resistance, both ascribed to its extractives. They contain biologically active compounds, mainly quinones and anthraquinones that confer a natural resistance against termites and fungi, as well as antioxidant and pharmacological activity. The increase in teak global demand is likely to continue, and along with this the residues to deal with. Since teak has amazing features, the byproducts from wood processing plants could be a potential biosource of chemical compounds. The twin-screw technology as a solid/liquid extraction technique of teak sawdust has been studied. The use of water as a solvent has been proposed, not only because it is a green solvent, but the appropriate pressure and temperature conditions can be reached inside the extruder leading water to subcritical conditions. Different conditions of temperature and liquid to solid ratio have been evaluated according to a defined experimental design. There have been obtained secondary metabolites with a high total phenolic content. The valorization of the extrudate as a raw material for the preparation of biocomposites has been as well studied.

Item Type:PhD Thesis
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Laboratory name:
Research Director:
Vandenbossche Maréchal, Virginie
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Deposited On:10 Dec 2021 09:23

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