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Fibre Individualisation and Mechanical Properties of a Flax-PLA Non-Woven Composite Following Physical Pre-Treatments
- Source :
- Coatings, Coatings, MDPI, 2021, 11 (7), pp.846. ⟨10.3390/coatings11070846⟩, Coatings, Vol 11, Iss 846, p 846 (2021), Volume 11, Issue 7
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Pre-treatments for plant fibres are very popular for increasing the fineness of bundles, promoting individualisation of fibres, modifying the fibre-matrix interface or reducing water uptake. Most pre-treatments are based on the use of chemicals and raise concerns about possible harmful effects on the environment. In this study, we used physical pre-treatments without the addition of chemical products. Flax tows were subjected to ultrasound and gamma irradiation to increase the number of elementary fibres. For gamma pre-treatments, a 20% increase in the number of elementary fibres was quantified. The biochemical composition of pre-treated flax tows exhibited a partial elimination of sugars related to pectin and hemicelluloses depending on the pre-treatment. The hygroscopic behaviour showed a comparable decreasing trend for water sorption-desorption hysteresis for both types of pre-treatment. Then, non-woven composites were produced from the pre-treated tows using poly-(lactid) (PLA) as a bio-based matrix. A moderate difference between the composite mechanical properties was generally demonstrated, with a significant increase in the stress at break observed for the case of ultrasound pre-treatment. Finally, an environmental analysis was carried out and discussed to quantitatively compare the different environmental impacts of the pre-treatments for composite applications<br />the environmental benefit of using gamma irradiation compared to ultrasound pre-treatment was demonstrated.
- Subjects :
- Pre treatment
flax tows
Materials science
food.ingredient
Pectin
Fineness
Composite number
composite materials
02 engineering and technology
mechanical properties
01 natural sciences
Stress (mechanics)
Matrix (chemical analysis)
[SPI]Engineering Sciences [physics]
food
Water uptake
Materials Chemistry
Composite material
010405 organic chemistry
ultrasound
Surfaces and Interfaces
[CHIM.MATE]Chemical Sciences/Material chemistry
gamma treatment
Engineering (General). Civil engineering (General)
021001 nanoscience & nanotechnology
0104 chemical sciences
Surfaces, Coatings and Films
environmental analysis
TA1-2040
0210 nano-technology
DVS
Gamma irradiation
Subjects
Details
- Language :
- English
- ISSN :
- 20796412
- Database :
- OpenAIRE
- Journal :
- Coatings, Coatings, MDPI, 2021, 11 (7), pp.846. ⟨10.3390/coatings11070846⟩, Coatings, Vol 11, Iss 846, p 846 (2021), Volume 11, Issue 7
- Accession number :
- edsair.doi.dedup.....a4fd46fd6af7bc79af5d053d248c6e54