Valorisation des anas de lin comme renforts de biocomposites

Abstract : Flax shives (FS) are the main by-product of the flax scutching industry and represent approximately 50 % of dry stem weight, making them a widely available resource having very low added value. In this study, raw flax shives have been fragmented by ball milling (sample FS50) and knife milling (samples FS250 and FS500) and used as reinforcing material in polypropylene injected composites. The biochemical composition of reinforcing samples in monosaccharides and lignin shows no variation after comminution, but a 50 % drop in crystallinity index was measured between raw flax shives and the ball-milled sample. The morphological study of reinforcing materials (length, aspect ratio) after processing were correlated to composite tensile properties showing an increase in Young's modulus with particle size, from 22.7 to 32.7 GPa for FS50 and FS500 respectively, the latter reaching 90% of the flax fibre reinforced composites. Flax shives provide promising mechanical performances.
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https://hal.archives-ouvertes.fr/hal-02130443
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Submitted on : Wednesday, May 15, 2019 - 6:25:03 PM
Last modification on : Tuesday, July 23, 2019 - 5:14:04 PM

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Lucile Nuez, Alain Bourmaud, Claire Mayer-Laigle, Johnny Beaugrand, Darshil Shah, et al.. Valorisation des anas de lin comme renforts de biocomposites. Journées Nationales sur les Composites 2019, Jul 2019, Bordeaux, France. ⟨hal-02130443⟩

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