Abstract
Spruce wood surfaces were treated with plasma with the aim of increacing either hydrophilicity or hydrophobicity. The treatments resulted in significant changes in wettability compared to aged and reference samples. Wettability was found to be a very good indicator of macroscopic bond strength. Nanoindentation adhesion measurements identified significant changes in adhesion at the immediate wood surface as a primary source of changes of bond performance, whereas mechanical performance of bulk wood cells was not affected.
Acknowledgments
We acknowledge the contribution of our students and technicians Christian Tippelreiter, Clemens Schmidberger and Gerhard Emsenhuber who carried out parts of the laboratory work. This work was co-funded by the Austrian Government within the FFG “Fabrik der Zukunft” program.
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