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Effects of modification with glutaraldehyde on the mechanical properties of wood

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Published/Copyright: February 18, 2010
Holzforschung
From the journal Volume 64 Issue 4

Abstract

Scots pine (Pinus sylvestris L.) sapwood was treated with glutaraldehyde (GA) and magnesium chloride (MgCl2) as a catalyst. The effects of treating conditions on the mechanical properties were examined. The weight percent gain (WPG) of thin veneer strips after leaching was highest at pH 4.0–4.5 and tensile strength measured in zero-span strength and finite-span strength decreased with decreasing pH in a range of 3.5–5.5. Sole treatment with MgCl2 also gradually decreased the tensile strength up to 25% with decreasing pH. At a fixed GA concentration (1.2 M), increasing MgCl2 concentration linearly diminished tensile strength. Conversely, increasing GA at a fixed MgCl2 concentration (1.5%) displayed the same effect, whereas in both cases zero-span strength loss was higher than finite span-strength loss. GA treatment of Scots pine sapwood stakes did not affect the modulus of rupture and the modulus of elasticity, but significantly reduced work to maximum load in bending and impact bending strength indicating embrittlement of wood. At the same time, compression strength increased with increasing WPG of GA. It is assumed that embrittlement caused by hydrolysis and crosslinking of cell wall polymers is compensated by enhanced compression strength thereby resulting in unchanged bending strength.

Keywords: bending strength; compression strength; glutaraldehyde; tensile strength; wood modification
Corresponding author. Wood Biology and Wood Products, Burckhardt-Institute, Georg August University of Göttingen, Büsgenweg 4, D37077 Göttingen, Germany Phone: +49-551-3919807 Fax: +49-551-399646
Received: 2009-12-20
Accepted: 2010-2-5
Published Online: 2010-02-18
Published Online: 2010-05-18
Published in Print: 2010-06-01

©2010 by Walter de Gruyter Berlin New York

Articles in the same Issue

  1. Original Papers
  2. Pre-extraction of hemicelluloses and subsequent ASA and ASAM pulping: Comparison of autohydrolysis and alkaline extraction
  3. Effect of drying and rewetting of wood on cellulose molecular packing
  4. Determination of native (wood derived) formaldehyde by the desiccator method in particleboards generated during panel production
  5. A computational study of pyrolysis reactions of lignin model compounds
  6. Energy reduction of refining by cellulases
  7. Macro- and micro-mechanical properties of red oak wood (Quercus rubra L.) treated with hemicellulases
  8. Acoustic emission measurements and lattice simulations of microfracture events in spruce
  9. Impact of organosilicon treatments on the wood-water relationship of solid wood
  10. Analysis of the water vapour sorption behaviour of Sitka spruce [Picea sitchensis (Bongard) Carr.] based on the parallel exponential kinetics model
  11. Effects of modification with glutaraldehyde on the mechanical properties of wood
  12. Effect of glutaraldehyde on water related properties of solid wood
  13. Creep behavior of bamboo under various desorption conditions
  14. Predicting the longitudinal modulus of elasticity of Sitka spruce from cellulose orientation and abundance
  15. Examination of the mode I critical stress intensity factor of wood obtained by single-edge-notched bending test
  16. Potential Brazilian wood species for bows of string instruments
  17. Non-destructive assessment of green density and moisture condition in plantation-grown radiata pine (Pinus radiata D. Don.) by increment core measurements
  18. Development of wood decay in wound-initiated discolored wood of eastern red cedar
  19. The effects of subthreshold loadings of tebuconazole, DDAC, and boric acid on wood decay by Postia placenta
  20. Short Notes
  21. New aspects of residual lignin isolation
  22. Personalia
  23. Horst H. Nimz celebrated his 80th birthday on April 21st, 2010
  24. Meetings
  25. Meetings
https://doi.org/10.1515/hf.2010.058
Keywords for this article
bending strength; compression strength; glutaraldehyde; tensile strength; wood modification

Articles in the same Issue

  1. Original Papers
  2. Pre-extraction of hemicelluloses and subsequent ASA and ASAM pulping: Comparison of autohydrolysis and alkaline extraction
  3. Effect of drying and rewetting of wood on cellulose molecular packing
  4. Determination of native (wood derived) formaldehyde by the desiccator method in particleboards generated during panel production
  5. A computational study of pyrolysis reactions of lignin model compounds
  6. Energy reduction of refining by cellulases
  7. Macro- and micro-mechanical properties of red oak wood (Quercus rubra L.) treated with hemicellulases
  8. Acoustic emission measurements and lattice simulations of microfracture events in spruce
  9. Impact of organosilicon treatments on the wood-water relationship of solid wood
  10. Analysis of the water vapour sorption behaviour of Sitka spruce [Picea sitchensis (Bongard) Carr.] based on the parallel exponential kinetics model
  11. Effects of modification with glutaraldehyde on the mechanical properties of wood
  12. Effect of glutaraldehyde on water related properties of solid wood
  13. Creep behavior of bamboo under various desorption conditions
  14. Predicting the longitudinal modulus of elasticity of Sitka spruce from cellulose orientation and abundance
  15. Examination of the mode I critical stress intensity factor of wood obtained by single-edge-notched bending test
  16. Potential Brazilian wood species for bows of string instruments
  17. Non-destructive assessment of green density and moisture condition in plantation-grown radiata pine (Pinus radiata D. Don.) by increment core measurements
  18. Development of wood decay in wound-initiated discolored wood of eastern red cedar
  19. The effects of subthreshold loadings of tebuconazole, DDAC, and boric acid on wood decay by Postia placenta
  20. Short Notes
  21. New aspects of residual lignin isolation
  22. Personalia
  23. Horst H. Nimz celebrated his 80th birthday on April 21st, 2010
  24. Meetings
  25. Meetings
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