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Cited by 33Natural Fiber Reinforced CompositesThermochemical Biomass Conversion ProcessesWood Treatment and Properties

Effect of the Pyro-Gasification Temperature of Wood on the Physical and Mechanical Properties of Biochar-Polymer Biocomposites

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Ayadi, Ramzi, Koubaa, Ahmed, Braghiroli, Flavia, Migneault, Sébastien, Wang, He, Bradai, Chedly·2020·Materials
DOI 10.3390/ma13061327PMC PMC7142591
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Abstract

The physical and mechanical properties of wood (WPC) and biochar polymer composites (BPC) obtained at different pyro-gasification temperatures and different fiber proportions were investigated. Composite pellets made from wood chips or biochar and thermoplastic polymers (polypropylene or high-density polyethylene) were obtained by twin-screw extrusion, and test specimens were prepared by injection molding. Results showed that BPCs were more dimensionally stable compared to WPCs, but their mechanical properties decreased with increasing pyro-gasification temperatures due to the poor adhesion between the polymer and biochar. Indeed, FTIR investigations revealed the decrease or absence of hydroxyl groups on biochar, which prevents the coupling agent from reacting with the biochar surface. The change in the biochar chemical structure led to an improvement in the dimensional stability and hydrophobicity of the biocomposites. Despite the increased dimensional stability of BPCs compared to WPCs, BPCs still adsorb water. This was explained by the surface roughness and by the biochar agglomerations present in the composite. In conclusion, the thermochemical conversion of black spruce wood chips into biochar makes it brittle but more hydrophobic, thereby reducing the wettability of the BPCs.

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Cited by

Sorted by citations

Authors
Ayadi, R., Koubaa, A., Braghiroli, F., Migneault, S., Wang, H., & Bradai, C.
Affiliations
  • Université du Québec en Abitibi-Témiscamingue (CA)
  • Centre Technologique des Résidus Industriels (CA)
  • National Engineering School of Sfax (ENIS), University of Sfax, Sfax 3038, Tunisia
Corresponding author
Koubaa, Ahmed
ORCID
Venue
Materials
Publisher
MDPI AG
Published
2020-03-14
Volume
13
Issue
6
Pages
1327
ISSN
1996-1944 (ISSN-L)
DOI
10.3390/ma13061327
PMC
PMC7142591
OpenAlex
W3011723264
Cited by
33
References
1
Citations by year
2026: 7 · 2025: 3 · 2024: 3 · 2023: 6 · 2022: 8 · 2021: 5 · 2020: 1
FWCI
1.90
Type
journal article
Language
en
Open access
Licence
Locations
  • Materials (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Depositum (Université du Québec en Abitibi-Témiscamingue) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Natural Sciences and Engineering Research Council of Canada (STPGP494346, EGP 486790 - 15)
  • Canada Research Chairs (950-230018)
  • Mitacs (IT08227)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Natural Fiber Reinforced Composites
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Engineering › Building and Construction › Wood Treatment and Properties
Keywords
biochar, wood-plastic composites, black spruce, polypropylene, high-density polyethylene, dimensional stability, hydrophobicity, wettability, hydroxyl group loss, water adsorption, surface roughness, mechanical properties

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