Optimization of thermopressing conditions for the production of binderless boards from a coriander twin‐screw extrusion cake

Uitterhaegen, Evelien; Labonne, Laurent; Merah, Othmane; Talou, Thierry; Ballas, Stéphane; Véronèse, Thierry

doi:10.1002/app.44650

Cited by 21 publications

(38 citation statements)

References 28 publications

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“…Nonetheless, the 10% required thickness swelling is not achieved for the moment. However, an additional process previously tested successfully by some other authors (Widyorini et al 2005, Okuda et al 2006, Halvarsson et al 2009, Saadaoui et al 2013, Evon et al 2015, Uitterhaegen et al 2017) such as preheating, chemical, or steam treatment would probably improve this dimensional stability parameter.…”

Section: Mechanical and Physical Properties Of Fiberboardsmentioning

confidence: 99%

Production of fiberboard from rice straw thermomechanical extrudates by thermopressing: influence of fiber morphology, water and lignin content

et al. 2018

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The objective of this study was to investigate the influence of fiber morphology and molding parameters on mechanical and physical properties of fiberboards made from rice straw. The rice straw was thermo-mechanically treated using a twin-screw extruder. Water added at molding (0-20%), lignin content (0-25%), and liquid/solid ratio used for extrudate production (0.33-1.07) were the three parameters investigated. A Doehlert's experimental design was used to evaluate their influence on boards' properties. The results revealed that 0.4 liquid/solid ratio at extrudate production, 5% water added at molding, and 8.9% lignin content were the best tested conditions for bending properties. Density of fiberboard produced from these conditions was 1414 kg/m 3 (i.e. the densest board). Maximum flexural strength and elastic modulus were 50.3 MPa and 8.6 GPa, respectively. Thickness swelling and water absorption were 23.6% and 17.6%, respectively. Using the statistical analysis of the experimental design, a good compromise between density and flexural properties should be obtained from 0% water added, 25% lignin content, and 0.33 liquid/solid ratio at extrudate production. From the polynomial models, the corresponding boards' properties should be approximately 50 MPa maximum flexural strength, 6.0 GPa elastic modulus, 1102 kg/m 3 density, and 24% thickness swelling.

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Section: Mechanical and Physical Properties Of Fiberboardsmentioning

confidence: 99%

Production of fiberboard from rice straw thermomechanical extrudates by thermopressing: influence of fiber morphology, water and lignin content

et al. 2018

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“…Les anas bruts, les anas extrudés et la Biolignin™ ont été sé ché s dans une é tuve ventilé e (60 °C, 12 h) pour minimiser la gé né ration de vapeur en fin de thermopressage. Un tel sé chage ré duit ainsi le risque de dé fauts tels que des cloques ou des fissures dans les panneaux obtenus [10][11][12][13]. Les taux d'humidité lors du moulage à chaud étaient respectivement de 3,7 %, 3,5 % et 3,2 %.…”

Section: Thermopressageunclassified

“…Les co-produits provenant de la culture du tournesol et de la coriandre ont dé jà é té exploité s pour ré aliser des panneaux de haute densité par thermopressage sans ajout de ré sine supplé mentaire [10][11]. De plus, parce que les anas ré vè lent naturellement une haute teneur en lignine, celle-ci pourrait ê tre utilisé e comme liant naturel, donnant l'opportunité d'obtenir un maté riau cohé sif sans ajout de ré sine pé trosourcé e. Des panneaux agglomé ré s et auto-lié s ont dé jà é té ré alisé s avec succè s à partir de tourteaux de tournesol [10], de coriandre [11][12] ou encore de jatropha [13], grâ ce à leurs fractions proté iques agissant comme des liants naturels. Pour les anas issus du lin olé agineux, il est raisonnable de supposer que les lignines contenues dans les anas pourraient agir comme liant naturel lors du thermopressage.…”

Section: Introductionunclassified

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Production of Fiberboards from Shives Collected after Continuous Fiber Mechanical Extraction from Oleaginous Flax

Evon¹,

Barthod-Malat²,

Grégoire³

et al. 2019

RCMA

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In this study, fiberboards were produced from shives collected after continuous fiber mechanical extraction from oleaginous flax straw. Fiberboards were produced through thermo-pressing, and their mechanical and thermo-mechanical properties were studied, as well as their water resistance. The influence of one pretreatment for shives and lignin addition was investigated on the different properties. Boards obtained were all cohesive hardboards. The optimal board was obtained from fibers extruded from shives and without addition of any supplementary lignin amount. Looking at its characteristics and standard NF EN 312, the latter perfectly complied with the requirements for type P1 boards, i.e. boards for general uses in dry conditions. RÉSUMÉ : Dans cette é tude, des panneaux agglomérés de fibres ont été produits à partir d'anas collectés aprè s extraction mé canique des fibres libé riennes de paille de lin olé agineux. Les panneaux ont été mis en oeuvre par thermopressage. Leurs propriétés mécaniques et thermo-mé caniques ont é té é tudié es ainsi que leur comportement vis-à-vis de l'eau. L'influence d'un pré traitement thermo-mécanique des anas bruts à l'aide d'une extrudeuse bi-vis a é té é tudié e ainsi que l'ajout de lignine exogène. Tous les panneaux mis en oeuvre possèdent une tenue suffisante pour ê tre manipulé s à la main. Le panneau ayant obtenu les proprié té s optimales a é té obtenu à partir des anas extrudé s et sans ajout supplé mentaire de lignine. Au regard de ses caracté ristiques et du standard NF EN 312, ce dernier remplit complètement les critères d'un panneau aggloméré de type P1 (panneau d'usage général utilisé en milieu sec).

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“…the solid raffinates) obtained were rich in carbohydrates (40 ± 5% of dry matter), fiber (25 ± 4% of dry matter), and proteins (14 ± 1% of dry matter). The chemical composition of the cake might hinder its direct exploitation, but it could be transformed into agromaterials, through the production, by hot pressing, of binderless boards for use in furniture, in particular [37][38][39][40].…”

Section: Oil Extraction and Resin Separation From Calophyllum Seedsmentioning

confidence: 99%

Direct Calophyllum oil extraction and resin separation with a binary solvent of n-hexane and methanol mixture

Kartika¹,

Cerny

Vandenbossche

et al. 2018

Fuel

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. This study investigated the use of a mixture of n-hexane and methanol as a binary solvent for the direct oil extraction and resin separation from Calophyllum seeds, in a single step. Optimal oil and resin yields and physicochemical properties were determined by identifying the best extraction conditions. The solvent mixture tested extracted oil and resin effectively from Calophyllum seeds, and separated resin from oil. Extraction conditions affected oil and resin yields and their physicochemical properties, with the n-hexane-to-methanol ratio being the most critical factor. Oil yield improved as n-hexane-to-methanol ratio increased from 0.5:1 to 2:1, and resin yield increased as methanol-to-n-hexane ratio increased from 0.5:1 to 2:1. Physicochemical properties of oil and resin, particularly for acid value and impurity content, improved as the n-hexane-to-methanol ratio decreased from 2:1 to 0.5:1. The best oil (51% with more than 95% triglycerides) and resin (18% with more than 5% polyphenols) yields were obtained with n-hexane-to-methanol ratios of 2:1 and 0.5:1, respectively, at a temperature of 50°C, with an extraction time of 5 h. The best values for physicochemical property of oil were a density of 0.885 g/cm 3 , a viscosity of 26.0 mPa.s, an acid value of 13 mg KOH/g, an iodine value of 127 g/100 g, an unsaponifiable content of 1.5%, a moisture content of 0.8% and an ash content of 0.04%.

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Optimization of thermopressing conditions for the production of binderless boards from a coriander twin‐screw extrusion cake

Cited by 21 publications

References 28 publications

Production of fiberboard from rice straw thermomechanical extrudates by thermopressing: influence of fiber morphology, water and lignin content

Production of fiberboard from rice straw thermomechanical extrudates by thermopressing: influence of fiber morphology, water and lignin content

Production of Fiberboards from Shives Collected after Continuous Fiber Mechanical Extraction from Oleaginous Flax

Direct Calophyllum oil extraction and resin separation with a binary solvent of n-hexane and methanol mixture

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