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Impact of thermomechanical fiber pre-treatment using twin-screw extrusion on the production and properties of renewable binderless coriander fiberboards

Uitterhaegen, Evelien and Labonne, Laurent and Merah, Othmane and Talou, Thierry and Ballas, Stéphane and Véronèse, Thierry and Evon, Philippe Impact of thermomechanical fiber pre-treatment using twin-screw extrusion on the production and properties of renewable binderless coriander fiberboards. (2017) International Journal of Molecular Sciences, 18 (7). 1-20. ISSN 1422-0067

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Official URL: http://dx.doi.org/10.3390/ijms18071539

Abstract

The aim of this study consisted of manufacturing renewable binderless fiberboards from coriander straw and a deoiled coriander press cake, thus at the same time ensuring the valorization of crop residues and process by-products. The press cake acted as a natural binder inside the boards owing to the thermoplastic behavior of its protein fraction during thermopressing. The influence of different fiber-refining methods was evaluated and it was shown that a twin-screw extrusion treatment effectively improved fiber morphology and resulted in fiberboards with enhanced performance as compared to a conventional grinding process. The best fiberboard was produced with extrusion-refined straw using a 0.4 liquid/solid (L/S) ratio and with 40% press cake addition. The water sensitivity of the boards was effectively reduced by 63% through the addition of an extrusion raw material premixing operation and thermal treatment of the panels at 200 °C, resulting in materials with good performance showing a flexural strength of 29 MPa and a thickness swelling of 24%. Produced without the use of any chemical adhesives, these fiberboards could thus present viable, sustainable alternatives for current commercial wood-based materials such as oriented strand board, particleboard and medium-density fiberboard, with high cost-effectiveness.

Item Type:Article
Additional Information:Thanks to MDPI editor. The original PDF of the article can be found at http://www.mdpi.com/1422-0067/18/7/1539
HAL Id:hal-01563759
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Ovalie Innovation (FRANCE)
Laboratory name:
Funders:
Ovalie Innovation (Auch, France)
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Deposited By: Philippe EVON
Deposited On:18 Jul 2017 08:01

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