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Adhesive penetration in beech wood: experiments

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Abstract

A study with synchrotron radiation X-ray tomographic microscopy (SRXTM) of PUR, PVAc, and UF adhesive bond lines in beech wood, bonded under various growth ring angles, is presented. The bond line morphologies and the adhesive penetration into the wood structure were evaluated after determining the hardening characteristics of the adhesives. Distinct bond line imperfections were found for the different adhesive systems. To describe the adhesive distribution inside the bond line, the saturation of the pore space instead of the commonly used maximum penetration depth seems to be adequate.

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Acknowledgments

The financial support of this work under SNF grant 116052 is acknowledged. We are also thankful for the access to the SLS beam line TOMCAT and its crew, namely S.A. McDonald, F. Marone, and M. Stampanoni and the valuable advice on data evaluation by A. Kästner. Furthermore, we thank Purbond AG (Sempach Station, Switzerland) and Geistlich Ligamenta AG (Schlieren, Switzerland) for providing us with the adhesives.

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Authors and Affiliations

  1. Institute for Building Materials, ETH Zurich, Schafmattstrasse 6, 8093, Zurich, Switzerland

    Philipp Hass, Falk K. Wittel, Miller Mendoza, Hans J. Herrmann & Peter Niemz

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  1. Philipp Hass
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  2. Falk K. Wittel
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  3. Miller Mendoza
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  4. Hans J. Herrmann
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  5. Peter Niemz
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Correspondence to Philipp Hass.

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Hass, P., Wittel, F.K., Mendoza, M. et al. Adhesive penetration in beech wood: experiments. Wood Sci Technol 46, 243–256 (2012). https://doi.org/10.1007/s00226-011-0410-6

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  • DOI: https://doi.org/10.1007/s00226-011-0410-6

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