Caractérisation et valorisation de fibres de chanvre issues de sols et de matériels délaissés : cas du traitement par explosion à la vapeur

Abstract : Hemp plants have been cultivated for their usable fibers for thousands of years. The fibers are long and resistant and can be utilized for creation of textile and composite materials, relevant to burgeoning industrial sectors. However, due to their lack of homogeneity and the complexity of their refining, hemp fibers are unable to compete with synthetic and cotton fibers. But fine hemp fibers could be successfully produced from technical fibers using a steam explosion treatment at a low cost, a low energy consumption and with a low environmental impact. To optimize the parameters of this process, a morphological, chemical, and mechanical characterization was performed before and after steam explosion using a design of experiments methodology. These experiments showed that this process can be used to produce hemp fibers with the standards defined by the textile and composite materials industries. Some features have also suggested some prospects in the industrialization of steam explosion for fibers production. These results showed that this process could be industrially competitive in terms of costs, water and energy consumption and yield. Finally, phytoremediation-borne hemp fibers were produced from soils contaminated with trace elements. The metals concentrations in plant components and in the fibers were measured before and after steam explosion treatment. The results offer new insights and prospects for a sustainable use of Technosols (in particular brownfield sites) by the production of hemp fibers
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https://hal.univ-lorraine.fr/tel-01923937
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Submitted on : Thursday, November 15, 2018 - 3:33:23 PM
Last modification on : Friday, November 16, 2018 - 1:20:14 AM

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  • HAL Id : tel-01923937, version 1

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Thibaud Sauvageon. Caractérisation et valorisation de fibres de chanvre issues de sols et de matériels délaissés : cas du traitement par explosion à la vapeur. Matériaux. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0211⟩. ⟨tel-01923937⟩

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