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Matériaux composites à fibres naturelles / polymère biodégradables ou non

Abstract : Natural fibers have recently attracted the attention of scientists because of their properties of low-cost, low density, renewable, biodegradable and nonabrasive. In this study, three types of bamboo fibers are prepared. Chemical modification of fibers by alkali is used to remove hemicellulose and lignin. Then, fiber surface is modified by acetylation and silane before processing composite materials with polypropylene. As expected, the mechanical properties of the composites increase with the average fibre diameter. Tensile strength and Young's modulus increase when using a coupling agent. Starch/PVA blends are also prepared with glycerol and water as plasticizer. The composite prepared by citric acid crosslinking has excellent mechanical properties. Tensile strength and elongation at break of starch/ PVA composite increase with the content of PVA. The presence of clay and fiber are both found to have considerable effect on the mechanical properties of the composites.
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https://tel.archives-ouvertes.fr/tel-00652477
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Submitted on : Thursday, December 15, 2011 - 4:42:43 PM
Last modification on : Friday, November 6, 2020 - 3:29:00 AM
Long-term archiving on: : Friday, March 16, 2012 - 2:40:30 AM

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  • HAL Id : tel-00652477, version 1

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Vi Vi Do Thi. Matériaux composites à fibres naturelles / polymère biodégradables ou non. Alimentation et Nutrition. Université de Grenoble; Université des Sciences Naturelles d'Ho Chi Minh Ville, 2011. Français. ⟨NNT : 2011GRENA012⟩. ⟨tel-00652477⟩

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