Effect of wood species on lignin-retaining high-transmittance transparent wood biocomposites

Bradai, Hamza, Koubaa, Ahmed, Zhang, Jingfa et Demarquette, Nicole R.. 2024. « Effect of wood species on lignin-retaining high-transmittance transparent wood biocomposites ». Polymers, vol. 16, nº 17.

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Résumé

This study explores lignin-retaining transparent wood biocomposite production through a lignin-modification process coupled with epoxy resin. The wood’s biopolymer structure, which includes cellulose, hemicellulose, and lignin, is reinforced with the resin through impregnation. This impregnation process involves filling the voids and pores within the wood structure with resin. Once the resin cures, it forms a strong bond with the wood fibers, effectively reinforcing the biopolymer matrix and enhancing the mechanical properties of the resulting biocomposite material. This synergy between the natural biopolymer structure of wood and the synthetic resin impregnation is crucial for achieving the desired optical transparency and mechanical performance in transparent wood. Investigating three distinct wood species allows a comprehensive understanding of the relationship between natural and transparent wood biocomposite properties. The findings unveil promising results, such as remarkable light transmittance (up to 95%) for Aspen transparent wood. Moreover, transparent wood sourced from White Spruce demonstrates excellent stiffness (E = 2450 MPa), surpassing the resin’s Young’s modulus. Also, the resin impregnation enhanced the thermal stability of natural wood. Conversely, transparent wood originating from Larch showcases superior impact resistance. These results reveal a clear correlation between wood characteristics such as density, anatomy, and mechanical properties, and the resulting properties of the transparent wood.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur Demarquette, Nicole R.
Affiliation:	Génie mécanique
Date de dépôt:	10 sept. 2024 16:00
Dernière modification:	12 sept. 2024 15:15
URI:	https://espace2.etsmtl.ca/id/eprint/29428

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