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Towards sustainable catalyst-free biomass-based polyurethane-wood composites (PU-WC): From valorization and liquefaction to future generation of biocomposites
Abstract
A substantial aspect of materials engineering lies in the responsible process of designing polymer-based materials. Due to environmental pollution, excessive consumption of natural resources, and increasing environmental awareness of society, there is a massive need for polyurethane (PU) materials with reduced environmental impact. To date, research on catalyst-free polyurethane-wood composites (PU-WC) has demonstrated a huge potential for commercialization in industrial production and can be used as a replacement for commonly used wood-plastic composites and wood-based panels. Based on this research, the introduction of new greener alternatives for petrochemical polyols to develop PU-WCs with a high biomass share could be interesting. In this study, up to 80% of bio-based polyol (BP) synthesized via biomass liquefaction was introduced to the polymer matrix. The effect of petrochemical polyol substitution was examined by mechanical testing, scanning electron microscopy (SEM), water absorption tests, and thermal analysis. The conducted research revealed that the structure and properties of PU-WCs strongly depend on the share of BP. The most promising composites were manufactured with up to 40% BP. The flexural strength of the PU-WC decreases from 25 to 9 MPa, and the flexural modulus varies from 1780 to 800 MPa. This may be caused by deteriorated adhesion between composite phases and a reduction in the stiffness of the materials due to the decrease in crosslinking density, which was confirmed by the decrease in glass transition temperature from 96 to 26 °C. In summary, this work shows the next step towards cleaner production of PU-WCs by substituting petrochemical polyols for alternatives synthesized using renewable resources.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
JOURNAL OF CLEANER PRODUCTION
no. 468,
ISSN: 0959-6526 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Olszewski A., Kosmela P., Piszczyk Ł.: Towards sustainable catalyst-free biomass-based polyurethane-wood composites (PU-WC): From valorization and liquefaction to future generation of biocomposites// JOURNAL OF CLEANER PRODUCTION -, (2024), s.143046-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jclepro.2024.143046
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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