Evon, Philippe. New process for the biorefinery of sunflower whole plant by thermo-mechano-chemical fractionation in twin-screw extruder: study of the aqueous extraction of lipids and manufacturing of the raffinate into agromaterials by compression moulding. PhD, Institut National Polytechnique de Toulouse, 2008, 388 p.
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Aqueous extraction of lipids from sunflower seed is studied in batch reactor. Diffusion inside particles is the limiting factor for the matter exchange. Proteins are involved in the release and the stabilization of lipids by water. Fractionation of the whole plant is also studied with water in twin-screw extrusion. An extract and a raffinate are produced separately and in a single continuous step. The oil is extracted in the form of oil-in-water emulsions and highest yield is 55%. The emulsion stability is ensured at interface by surface-active agents: phospholipids and proteins or even pectins. Extracts are also made up of a hydrophilic phase. This major fraction contains water-soluble components (proteins, pectins...). Raffinates are rich in fibers and also have a significant content of proteins with thermoplastic behaviour. They can be manufactured into agromaterials by compression moulding.
|Item Type:||PhD Thesis|
|Institution:||French research institutions > Institut National de la Recherche Agronomique - INRA|
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France) - Fractionnement et transformation des agroressources
|Deposited By:||Philippe EVON|
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