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Evaluation of new quaternary ammonium compound, didecyldimethylammonium tetrafluoroborate (DBF) in comparison with DDAC: Leachability and termite resistance tests

Bewertung der neuen quaternären Ammoniakverbindung Didecyl-Dimethyl-Ammoniumtetrafluoroborat (DBF)im Vergleich mit DDAC: Tests zu Auswaschbarkeitund Termitenresistenz

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Abstract

Modifications in the structure of wood preserving quaternary ammonium compounds (QACs) may result in improvements in leaching of components and biological resistance of treated wood. In this study, we evaluated the leaching characteristics and termite resistance of wood treated with a newly developed QAC compound didecyldimethylammonium tetrafluoroborate (DBF) in comparison with commercial DDAC, another QAC compound. Laboratory leaching tests showed that amount of DBF released from treated wood specimens was less than that of DDAC. However there was no difference between DBF and DDAC in the resistance of treated wood specimens against termite attack. Retention level at about 3 kg/m3 of DBF and DDAC seems to be enough to protect wood against termite attack, however, no comparative data are available for resistance of DBF and DDAC-treated wood against wood degrading fungi. Field tests are also needed to determine the performance of DBF-treated wood in ground contact in comparison with DDAC.

Zusammenfassung

Durch Modifikation quaternärer Ammoniakverbindungen (QACs) in Holzschutzmitteln lassen sich die Auswaschbarkeit und biologische Dauerhaftigkeit von behandeltem Holz verbessern. In dieser Studie wurden die Auswaschbarkeit sowie die Termitenresistenz von Holz, das mit der neuen QAC-Verbindung Didecyl-Dimethyl-Ammoniumtetrafluoroborat (DBF) behandelt wurde, verglichen mit Holz das mit gebräuchlichem DDAC, einer anderen QAC-Verbindung, behandelt wurde. Laborversuche zeigten, dass aus behandeltem Holz weniger DBF als DDAC ausgewaschen wurde. Dagegen konnte bezüglich der Termitenresistenz zwischen den mit DBF und den mit DDAC behandelten Holzproben kein Unterschied festgestellt werden. Eine Einbringmenge von 3 kg/m3 DBF oder DDAC scheint zum Schutz gegen Termitenbefall ausreichend zu sein. Allerdings gibt es keine Vergleichsdaten zur Resistenz von mit DBF oder DDAC behandeltem Holz gegen Pilzbefall. Weiterhin sind Feldversuche erforderlich, um das Verhalten von DBF behandeltem Holz in Erdkontakt mit Holz, das mit DDAC behandelt wurde, zu vergleichen.

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Authors and Affiliations

  1. Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Kyoto, Japan

    Won-Joung Hwang & Yuji Imamura

  2. Forestry Faculty, Istanbul University, 34473, Bahcekoy, Istanbul, Turkey

    S. Nami Kartal

Authors
  1. Won-Joung Hwang
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  2. S. Nami Kartal
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  3. Yuji Imamura
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Correspondence to Won-Joung Hwang.

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Hwang, WJ., Kartal, S. & Imamura, Y. Evaluation of new quaternary ammonium compound, didecyldimethylammonium tetrafluoroborate (DBF) in comparison with DDAC: Leachability and termite resistance tests. Holz Roh Werkst 64, 111–116 (2006). https://doi.org/10.1007/s00107-005-0049-9

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