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Polymers 2018, 10(1), 81; https://doi.org/10.3390/polym10010081

Suitability of Different Variants of Polyethylene Glycol Impregnation for the Dimensional Stabilization of Oak Wood

1
Wood K Plus—Competence Centre for Wood Composites and Wood Chemistry, Altenberger Stasse 69, 4040 Linz, Austria
2
Department of Material Science and Process Engineering, Institute of Wood Technology and Renewable Materials, University of Natural Resources and Life Science (BOKU), Konrad Lorenzstrasse 24, 3430 Tulln, Austria
*
Author to whom correspondence should be addressed.
Received: 6 December 2017 / Revised: 11 January 2018 / Accepted: 12 January 2018 / Published: 16 January 2018
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Abstract

The common method to impregnate wood with polyethylene glycol (PEG) is to store the samples for several weeks in aqueous PEG-solution, allowing for diffusion of PEG into the wood. As this method is poorly suited for industrial application, an alternative approach based on vacuum-pressure treatment is evaluated in the present study. Using European oak wood and three variants of PEG, including silane-functionalized PEG, impregnation experiments at different PEG concentrations were performed. Significant uptake of PEG resulted in clearly altered wood-water relations and improved dimensional stability of oak wood. These results are discussed in terms of stability in humid and aqueous environments, and in terms of effects of the anatomy of oak wood on differences in dimensional stabilization observed along the radial and tangential anatomical directions, respectively. While both of the PEG variants perform better with an anti-shrinkage efficiency of up to 80%, the PEG-silane variant performs less effectively in this respect; however PEG-silane is clearly predominant in case of water extraction. View Full-Text
Keywords: silane; polyethylene glycol (PEG); oak wood; impregnation; anti-shrinkage efficiency (ASE); wood modification silane; polyethylene glycol (PEG); oak wood; impregnation; anti-shrinkage efficiency (ASE); wood modification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Meints, T.; Hansmann, C.; Gindl-Altmutter, W. Suitability of Different Variants of Polyethylene Glycol Impregnation for the Dimensional Stabilization of Oak Wood. Polymers 2018, 10, 81.

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