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Citric acid as waterproofing additive in butt joints linear wood welding

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Abstract

Citric acid was used to improve resistance to water of the welded joint of spruce along the end-grain-to-end-grain faces. The use of 10–20% citric acid as treatment during a very short time has been shown to markedly improve both the mechanical performance and the water resistance of welded spruce. Based on the results of the water resistance tests it appears that the application of citric acid as a natural waterproofing additive in wood welding is possible. The use of citric acid thus allows the preparation of welded wood joints satisfying the requirement of frequent short-term and long-term exposure to water. 13C NMR analysis indicated that lignin modification of the welded material is related to the improvement of water resistance and shear properties of the welded joints.

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Acknowledgements

This work was funded by the French National Research Agency (ANR) through the project ANR-14-CE07-0021 (SOUDABOIS II).

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Authors and Affiliations

  1. LERMAB, University of Lorraine, Epinal, France

    S. Amirou & A. Pizzi

  2. Department of Physics, King Abdulaziz University, Jeddah, Saudi Arabia

    A. Pizzi

  3. Material Science Institute of Mulhouse, CNRS UMR 7361, University of Haute Alsace, Mulhouse, France

    L. Delmotte

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  1. S. Amirou
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  2. A. Pizzi
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  3. L. Delmotte
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Correspondence to S. Amirou.

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Amirou, S., Pizzi, A. & Delmotte, L. Citric acid as waterproofing additive in butt joints linear wood welding. Eur. J. Wood Prod. 75, 651–654 (2017). https://doi.org/10.1007/s00107-017-1167-x

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  • DOI: https://doi.org/10.1007/s00107-017-1167-x

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