Wood Science and Technology

, Volume 45, Issue 4, pp 707–718 | Cite as

Copper complexes grafted to functionalized silica gel as wood preservatives against the brown rot fungus Coniophora puteana

  • Sabrina Palanti
  • Giovanni Predieri
  • Francesca Vignali
  • Elisabetta Feci
  • Antonella Casoli
  • Elena Conti


Wood modification with siloxanes bearing amino groups with copper-linking function was carried out by a sol–gel process. Tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTES) were the main components. Two different procedures were followed: a two-step process (impregnation with the TEOS/APTES mixture followed by dipping into a copper sulphate solution) and a one-step process (impregnation with a homogeneous sol mixture of TEOS, APTES and copper (II) chloride). The obtained materials were characterized by infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy dispersive X-ray microanalysis. The determination of copper content before and after leaching was performed by atomic absorption spectroscopy. The efficacy against the brown rot fungus Coniophora puteana was tested by an accelerated procedure. SEM analyses showed that silicon penetrated into wood, while copper is effectively drawn into wood only in the one-step treatment. Copper fixation to the silica gel proved to be adequately strong. Both sol–gel treatments gave good protection against Coniophora puteana.


Wood Block Wood Specimen Weight Percent Gain Wood Preservative Fungal Decay 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The present work was financially supported by Sofie 2 project, Autonomous province of Trento. Authors wish to thank Dr. Andrea Azelio Mencaglia of CNR IFAC for laser cutting and Mrs. Anna Maria Torniai of CNR IVALSA for the preparation of fungal decay laboratory tests.


  1. Bravery AF (1979) A miniaturised wood-block test for the rapid evaluation of wood preservative fungicides. IRG/WP 2113. International Research Group on Wood Protection, StockholmGoogle Scholar
  2. Breitscheidel B, Zieder J, Schubert U (1991) Metal complexes in inorganic matrices. 7. Nanometer-sized, uniform metal particles in a SiO2 matrix by sol-gel processing of metal complexes. Chem Mater 3:559–566CrossRefGoogle Scholar
  3. Craciun R, Maier M, Habicht J (2009) A theoretical-industrial correlation and perspective on copper-based wood preservatives—a review of thermodynamic and kinetic aspects on copper-wood fixation mechanism. IRG/WP 09 30499. International Research Group on Wood Protection, StockholmGoogle Scholar
  4. De Vetter L, Stevens M, Van Acker J (2009) Fungal decay resistance and durability of organosilicon-treated wood. Int Biodeterior Biodegradation 63:130–134CrossRefGoogle Scholar
  5. Donath S, Militz H, Mai C (2004) Wood modification with alkoxysilanes. Wood Sci Technol 38:555–566CrossRefGoogle Scholar
  6. Donath S, Militz H, Mai C (2006) Treatment of wood with aminofunctional silanes for protection against wood destroying fungi. Holzforschung 60(2):210–216CrossRefGoogle Scholar
  7. Eaton RA, Hale MDC (1993) Wood: decay pests and protection. Chapman and Hall, LondonGoogle Scholar
  8. European Committee for Standardization EN 113 (1996) Wood preservatives. Test method for determining the protective effectiveness against wood destroying basidiomycetes—determination of the toxic valuesGoogle Scholar
  9. European Committee for Standardization EN 335-1 (2006) Durability of wood and wood-based products. Definition of use classes. Part 1: generalGoogle Scholar
  10. European Committee for Standardization EN 84 (1997) Wood preservatives—accelerated ageing of treated wood prior to biological testing. Leaching procedureGoogle Scholar
  11. European Committee for Standardization EN ISO 3696 (1996) Water for analytical laboratory use. Specification and test methodsGoogle Scholar
  12. Feci E, Nunes L, Palanti S, Duarte S, Predieri G, Vignali F (2009) Effectiveness of sol-gel treatments coupled with copper and boron against subterranean termites IRG/WP 09 30493. International Research Group on Wood Protection, StockholmGoogle Scholar
  13. Ferrari C, Predieri G, Tiripicchio A, Costa M (1992) Anchoring metal species on a thiourea-functionalized silica xerogel. In situ production of colloidal palladium particles. Chem Mater 4:243–245CrossRefGoogle Scholar
  14. Ghosh SC, Mai C, Militz H (2008) The efficacy of commercial silicone against blue stain and mould fungi in wood. IRG/WP 08–30471. International Research Group on Wood Protection, StockholmGoogle Scholar
  15. Hernan P, Del Pino C, Ruiz-Hitzky E (1992) Rhodium complexes with nitrogen-donor ligands anchored on silicic supports. 1. Synthesis and characterization. Chem Mater 4:49–55CrossRefGoogle Scholar
  16. Hill CAS, Farahani MRM, Hale MDC (2004) The use of organo alkoxysilane coupling agents for wood preservation. Holzforschung 58(3):316–325CrossRefGoogle Scholar
  17. Hughes A (2004) The tools at our disposal. Final workshop cost action E22. Lisbon, PortugalGoogle Scholar
  18. Kartal SN, Hwang WJ, Yamamoto A, Tanaka M, Matsumara K, Imamura Y (2007) Modification of wood with a commercial silicon emulsion: effects on boron release and decay and termite resistance. Int Biodeterior Biodegradation 60:189–196CrossRefGoogle Scholar
  19. Kartal SN, Yoshimura T, Imamura Y (2009) Modification of wood with Si compounds to limit boron leaching from treated wood and to increase termite and decay resistance. Int Biodeterior Biodegradation 63:187–190CrossRefGoogle Scholar
  20. Khatib IS, Parish RV (1989) Insoluble ligands and their applications. I. A comparison of silica-immobilized ligands and functionalized polysiloxanes. J Organomet Chem 369:9–16CrossRefGoogle Scholar
  21. Klonkowsky AM, Grobelna B, Widernik T, Jankowska-Frydel A, Mozgawa W (1999) The coordination state anchored and grafted onto the surface of organically modified silicates. Langmuir 15:5814–5819CrossRefGoogle Scholar
  22. Laks PE (2008) Wood preservative fungicides and American WOOD Preservers’ association use category system In: development of commercial wood preservatives ACS symposium series 982 American Chemical Society pp 228–240Google Scholar
  23. Mahltig B, Swaboda C, Roessler A, Böttcher H (2008) Functionalising wood by nanosol application. J Mater Chem 18:3180–3192CrossRefGoogle Scholar
  24. Mai C, Militz H (2004) Modification of wood with silicon compounds: inorganic silicon compounds and sol-gel systems: a review. Wood Sci Technol 37:339–348CrossRefGoogle Scholar
  25. Ogiso K, Saka S (1994) Wood-inorganic composites prepared by sol-gel processing. IV. Effects of chemical bonds between wood and inorganic substances on property enhancement. Mokuzai Gakkaishi 40:1100–1106Google Scholar
  26. Pernak J, Zabielska-Mateljuc J, Kropacs A, Foksowicz-Flaczyk J (2004) Ionic liquid in wood preservation. Holzforschung 52(3):286–291CrossRefGoogle Scholar
  27. Reinsch S, Böcker W, Bücker M, Seeger S, Unger B (2002) Development of wood-inorganic composites with enhanced properties and environmental stability. In: Proceedings 4th international wood and fiber symposium, Kassel, Germany, 10–11 April 2002Google Scholar
  28. Rozman HD, Abusamah A, Kumar RN, Abdul Khalil HPS (1997) Rubberwood polymer composites based on methacrylic silane and methyl methacrylate. J Tropical For Prod 2(2):227–237Google Scholar
  29. Schneider MH, Brebner KI (1985) Wood polymer combination: the chemical modification of wood by alkoxysilane coupling agents. Wood Sci Technol 19(1):67–73CrossRefGoogle Scholar
  30. Sèbe G, Brook MA (2001) Hydrophobization of wood surfaces: covalent grafting of silicone polymers. Wood Sci Technol 35:269–282CrossRefGoogle Scholar
  31. Terziev N, Panov D, Temiz A, Palanti S, Feci E, Daniel G (2009) Laboratory and above ground exposure efficacy of silicon-boron treatments. IRG/WP 09 30510. International Research Group on Wood Protection, StockholmGoogle Scholar

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Sabrina Palanti
    • 1
  • Giovanni Predieri
    • 2
  • Francesca Vignali
    • 2
  • Elisabetta Feci
    • 1
  • Antonella Casoli
    • 2
  • Elena Conti
    • 3
  1. 1.CNR-IVALSA Istituto per la Valorizzazione del Legno e delle Specie ArboreeSesto FiorentinoItaly
  2. 2.Dipartimento di Chimica G.I.A.F.Università di ParmaParmaItaly
  3. 3.CATAS S.p.A.San Giovanni al NatisoneItaly

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