Abstract
This research focuses on increasing wood resistance against UV degradation using trimethoxyphenylsilane as modifying agent and supercritical CO2 as a green solvent and reaction medium. Trimethoxyphenylsilane was successfully grafted on European spruce (Picea abies, H. Karst) and was characterized by SEM-EDX and UV–vis reflectance. SEM-EDX showed the presence of silicium inside the wood cell wall. Increased wood moisture content showed positive effect on weight gain of trimethoxyphenylsilane after treatment. UV resistance of treated wood was evaluated by following the color change during artificial weathering. Modified samples showed improved weathering resistance compared to unmodified wood with a ΔE value around 5 after 260 h. Processing and modifying wood using supercritical CO2 is a promising route to increase wood performances and increase its use as a building material.
Funding source: Région Auvergne-Rhône-Alpes
Acknowledgments
The authors would like to acknowledge collaborators who provided technical support: Olivier Blanchot and Arnaud Guiot from CEA. The authors would like to thank the nanocharacterization platform for the access to the SEM-EDX and technical support.
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Research ethics: Not applicable.
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Author contributions: JT conducted the laboratory experiments, analyzed the results and wrote the manuscript. OR and PP supervised the work and revised the manuscript. The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: This work was funded through the program “Investissement Innovation” granted to CEA by the region Auvergne Rhône-Alpes (AuRA) in France.
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Data availability: The raw data can be obtained on request from the corresponding author.
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