Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications
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 environm...
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MDPI AG
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doaj-6779b0ceb10f4d28bf6f96b02c0b46712021-07-23T13:36:16ZengMDPI AGCoatings2079-64122021-07-011185285210.3390/coatings11070852Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile ApplicationsSaif Ullah Khan0Laurent Labonne1Pierre Ouagne2Philippe Evon3Laboratoire de Chimie Agro-industrielle, Université de Toulouse, INRAE, ENSIACET, 31030 Toulouse, FranceLaboratoire de Chimie Agro-industrielle, Université de Toulouse, INRAE, ENSIACET, 31030 Toulouse, FranceLaboratoire Génie de Production, Université de Toulouse, ENIT, 65016 Tarbes, FranceLaboratoire de Chimie Agro-industrielle, Université de Toulouse, INRAE, ENSIACET, 31030 Toulouse, FranceLinseed 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.https://www.mdpi.com/2079-6412/11/7/852linseed flaxstrawfibre mechanical extractionshivesmean fibre lengthmean fibre diameter |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Saif Ullah Khan Laurent Labonne Pierre Ouagne Philippe Evon |
spellingShingle |
Saif Ullah Khan Laurent Labonne Pierre Ouagne Philippe Evon Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications Coatings linseed flax straw fibre mechanical extraction shives mean fibre length mean fibre diameter |
author_facet |
Saif Ullah Khan Laurent Labonne Pierre Ouagne Philippe Evon |
author_sort |
Saif Ullah Khan |
title |
Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications |
title_short |
Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications |
title_full |
Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications |
title_fullStr |
Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications |
title_full_unstemmed |
Continuous Mechanical Extraction of Fibres from Linseed Flax Straw for Subsequent Geotextile Applications |
title_sort |
continuous mechanical extraction of fibres from linseed flax straw for subsequent geotextile applications |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2021-07-01 |
description |
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. |
topic |
linseed flax straw fibre mechanical extraction shives mean fibre length mean fibre diameter |
url |
https://www.mdpi.com/2079-6412/11/7/852 |
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