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Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions

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Published/Copyright: November 23, 2012
Holzforschung
From the journal Holzforschung Volume 67 Issue 4

Abstract

The antileaching efficacy of sol-gel-derived TiO2- and SiO2-based precursors has been evaluated through laboratory leaching trials with pine sapwood in two different ways. In a one-step process, wood was vacuum impregnated by the precursor solutions containing CuCl2. The copper (Cu) emission rates of the sol-gel-based impregnated woods were up to 70% lower than that of wood treated with pure CuCl2 solution at the same level of concentration. More improvement (80%) could be achieved in a two-step process, in which sol-gel precursors were introduced into an already CuCl2-treated wood. The refinement was attributed to several effects. In the one-step approach, Cu was embedded in the TiO2/SiO2 gels formed in the wood texture. During a two-step impregnation, gel layers that were formed in the wooden interior acted as an effective diffusion barrier. The sol-gel impregnations made wood more hydrophobic; therefore, the low amount of water that penetrated the cell wall was less efficient to leach out Cu.

Keywords: copper leachability; SiO2-based gel; sol-gel treatment of wood; TiO2-based gel; wood impregnation; wood protection
Corresponding author: Thomas Hübert, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 44-46, 12203 Berlin, Germany, Tel.: +49 30 8104 1824.

Dr. Ute Schoknecht, Dr. Brita Unger, Ines Feldmann, Thomas Sommerfeld, Yvonne de Laval, Jörg Schlischka, and Franziska Lindemann of BAM Federal Institute for Materials Research and Testing are gratefully acknowledged for their technical support in correcting the article, preparing the solutions, and conducting ESEM and AAS measurements.

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Received: 2012-6-20
Accepted: 2012-10-16
Published Online: 2012-11-23
Published in Print: 2013-05-01

©2013 by Walter de Gruyter Berlin Boston

Articles in the same Issue

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  2. Masthead
  3. Original Articles
  4. A new lignan glycoside and phenolics from the branch wood of Pinus banksiana Lambert
  5. Fragmentation mechanism of the phenylcoumaran-type lignin model compound by ToF-SIMS
  6. Enzymatic hydrolysis of loblolly pine: effects of cellulose crystallinity and delignification
  7. Aggregation and adsorption behaviors of carboxymethylated lignin (CML) in aqueous solution
  8. The adsorption and dispersing mechanisms of sodium lignosulfonate on Al2O3 particles in aqueous solution
  9. Moisture-dependent orthotropic tension-compression asymmetry of wood
  10. Time-domain NMR study of the drying of hemicellulose extracted aspen (Populus tremuloides Michx.)
  11. Substitution of phenol in phenol-formaldehyde (PF) resins by wood tar for plywood adhesives
  12. Modification of Pinus sylvestris L. wood with quat- and amino-silicones of different chain lengths
  13. Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions
  14. Measuring the thermal properties of green wood by the transient plane source (TPS) technique
  15. Effect of short-chain silicones bearing different functional groups on the resistance of pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) against decay fungi
  16. Antimicrobial surfaces of quaternized poly[(2-dimethyl amino)ethyl methacrylate] grafted on wood via ARGET ATRP
  17. Cloning and characterization of a 2,3-oxidosqualene cyclase from Eleutherococcus trifoliatus
  18. Phylogenetic analysis of the genus Fusarium and their antifungal activity against wood-decay and sapstain fungi
  19. Meetings
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https://doi.org/10.1515/hf-2012-0105
Keywords for this article
copper leachability; SiO2-based gel; sol-gel treatment of wood; TiO2-based gel; wood impregnation; wood protection

Articles in the same Issue

  1. Masthead
  2. Masthead
  3. Original Articles
  4. A new lignan glycoside and phenolics from the branch wood of Pinus banksiana Lambert
  5. Fragmentation mechanism of the phenylcoumaran-type lignin model compound by ToF-SIMS
  6. Enzymatic hydrolysis of loblolly pine: effects of cellulose crystallinity and delignification
  7. Aggregation and adsorption behaviors of carboxymethylated lignin (CML) in aqueous solution
  8. The adsorption and dispersing mechanisms of sodium lignosulfonate on Al2O3 particles in aqueous solution
  9. Moisture-dependent orthotropic tension-compression asymmetry of wood
  10. Time-domain NMR study of the drying of hemicellulose extracted aspen (Populus tremuloides Michx.)
  11. Substitution of phenol in phenol-formaldehyde (PF) resins by wood tar for plywood adhesives
  12. Modification of Pinus sylvestris L. wood with quat- and amino-silicones of different chain lengths
  13. Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions
  14. Measuring the thermal properties of green wood by the transient plane source (TPS) technique
  15. Effect of short-chain silicones bearing different functional groups on the resistance of pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) against decay fungi
  16. Antimicrobial surfaces of quaternized poly[(2-dimethyl amino)ethyl methacrylate] grafted on wood via ARGET ATRP
  17. Cloning and characterization of a 2,3-oxidosqualene cyclase from Eleutherococcus trifoliatus
  18. Phylogenetic analysis of the genus Fusarium and their antifungal activity against wood-decay and sapstain fungi
  19. Meetings
  20. Meetings
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