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Continuous mechanical extraction of fibres from linseed flax straw for subsequent geotextile applications

Khan, Saif Ullah and Labonne, Laurent and Ouagne, Pierre and Evon, Philippe Continuous mechanical extraction of fibres from linseed flax straw for subsequent geotextile applications. (2021) Coatings, 11 (7). 852. ISSN 2079-6412

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Official URL: https://doi.org/10.3390/coatings11070852

Abstract

Linseed flax is a multipurpose crop. It is cultivated for its seeds and particularly for its oil. The main contributors for this crop are Canada, France and Belgium. In general, straws of linseed flax are buried in the fields or burnt. However, these solutions are not good practices for the environment and from an economical point of view. In this study, straws of linseed flax (six batches in total) with different dew retting durations and harvesting techniques were studied to possibly use them for producing innovative geotextiles. Two different fibre extraction processes were investigated. A first process (A) involved horizontal breaker rollers and then a breaking card. A second one (B) consisted in using vertical breaker rollers, and an “all fibre” extraction device (fibre opener) followed by sieving. The chemical composition of fibres in parietal constituents appeared to be globally equivalent to the one of textile flax with a pectic content decreasing as a function of the dew retting duration. This contributed to an increase in the cellulose content. The fibre content was situated in a range from 29% to 33%, which corresponds to a good yield for linseed flax fibre. The level of purity can reach values of up to 90% for method A (without extra-sieving) and 96% for method B (with extra-sieving), and the length of the fibres (larger for method A than for method B) and their tensile properties make them suitable for structural geotextile yarn manufacturing.

Item Type:Article
Additional Information:This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). This article is available at the adresse : https://www.mdpi.com/2079-6412/11/7/852
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut national de recherche pour l'agriculture, l'alimentation et l'environnement - INRAE (FRANCE)
Other partners > Balochistan University of Information Technology, Engineering and Management Sciences - BUITEMS (PAKISTAN)
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Deposited On:02 Nov 2021 15:15

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