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Improvement of fungicidal properties and copper fixation of copper-ethanolamine wood preservatives using octanoic acid and boron compounds

Verbesserung der fungiziden Eigenschaften und der Kupferfixierung von Kupferethanolamin-Holzschutzmitteln mittels Octansäure und Borverbindungen

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Abstract

Copper ethanolamine preservatives are one of the most important solutions for wood preservation. As copper itself can not ensure sufficient protection against wood destroying organisms we combine it with other co-biocides like quaternary ammonium compounds, azoles and/or boron. Influence of different boron compounds and octanoic acid on copper fixation as well as performance of spruce wood impregnated with different copper/ethanolamine/boron based aqueous solutions is described in this paper. Copper fixation was determined according to the modified ENV 1250 (1994) standard method, while performance against Antrodia vaillantii, Gloeophyllum trabeum and Trametes versicolor was tested according to the mini block procedure. The results showed that addition of boron increases copper leaching, but on the contrary improves performance against wood decay fungi. On the other hand, addition of octanoic acid improves copper fixation, and slightly decreases resistance against copper tolerant fungi.

Zusammenfassung

Kupferethanolamin ist eine der wichtigsten Substanzen für Holzschutzmittel. Da Kupfer alleine keinen ausreichenden Schutz gegen Holz zerstörende Organismen bietet, wird es mit anderen Bioziden, wie zum Beispiel quaternären Ammoniumverbindungen, Pyrrol und/oder Bor, kombiniert. Diese Arbeit beschreibt den Einfluss verschiedener Borverbindungen sowie Octansäure auf die Kupferfixierung sowie das Verhalten von mit verschiedenen kupfer-/ethanolamin-/borhaltigen Lösungen imprägniertem Fichtenholz. Die Kupferfixierung wurde in Anlehnung an ENV 1250 (1994) bestimmt. Die Wirksamkeit gegen Antrodia vaillantii, Gloeophyllum trabeum und Trametes versicolor wurde mit dem “Mini-Block”-Verfahren geprüft. Dabei zeigte sich, dass der Zusatz von Bor zu einer erhöhten Kupferauswaschung führte, jedoch die Wirksamkeit gegen Holz zerstörende Pilze verbesserte. Der Zusatz von Octansäure verbesserte dagegen die Kupferfixierung, verringerte aber in geringem Umfang die fungizide Wirkung.

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Authors and Affiliations

  1. Biotechnical faculty, Department of Wood science and technology, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia

    Miha Humar & Franc Pohleven

  2. Slovenian Forestry Institute, Ljubljana, Slovenia

    Daniel Žlindra

Authors
  1. Miha Humar
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  2. Daniel Žlindra
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  3. Franc Pohleven
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Correspondence to Miha Humar.

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Humar, M., Žlindra, D. & Pohleven, F. Improvement of fungicidal properties and copper fixation of copper-ethanolamine wood preservatives using octanoic acid and boron compounds . Holz Roh Werkst 65, 17–21 (2007). https://doi.org/10.1007/s00107-006-0118-8

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  • DOI: https://doi.org/10.1007/s00107-006-0118-8

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