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Wood Science and Technology

, Volume 41, Issue 4, pp 351–360 | Cite as

Effects of previous solvent exchange on acetylation of wood

  • Eiichi ObatayaEmail author
  • Kazuya Minato
ORIGINAL

Abstract

Wood specimens were prepared in a swollen state using solvent exchange (PS) treatment. The swollen wood specimens were acetylated using acetic anhydride by heating at 80–120°C. At the beginning of heating, the weight percent gain (WPG) of PS-treated wood was greater than that of conventionally acetylated wood. This acceleration effect of the PS treatment was explained by the introduction of treating reagent into the wood polymers where the intermolecular hydrogen bonds were previously broken. On the other hand, the PS treatment had no influence on the final WPG and moisture sorption characteristics of acetylated wood. This indicated that the intrinsic reactivity of wood constituents was unaffected by the PS treatment. The acetylation of PS-treated wood produced greater bulking and slightly higher dimensional stability than that in the case of conventional acetylation at the same WPG. It was speculated that the expansion of cell lumina due to the PS treatment resulted in greater bulking on acetylation and lesser swelling of acetylated wood with moisture sorption.

Keywords

Acetic Anhydride Equilibrium Moisture Content Cell Lumina Wood Specimen Moisture Sorption 
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.

References

  1. Hill CAS, Ormondroyd GA (2004) Dimensional changes in Corsican pine (Pinus nigra Arnold) modified with acetic anhydride measured using a helium pycnometer. Holzforschung 58(5):544–547CrossRefGoogle Scholar
  2. Hill CAS, Papadopoulos AN, Payne D (2004) Chemical modification employed as a means of probing the cell-wall micropore of pine sapwood. Wood Sci Technol 37(6):475–488CrossRefGoogle Scholar
  3. Minato K, Ito Y (2004) Analysis of the factors influencing the acetylation rate of wood. J Wood Sci 50:519–523CrossRefGoogle Scholar
  4. Minato K, Ogura K (2003) Dependence of reaction kinetics and physical and mechanical properties on the reaction systems of acetylation I: reaction kinetic aspects. J Wood Sci 49:418–422CrossRefGoogle Scholar
  5. Obataya E, Gril J (2005) Swelling of acetylated wood I: swelling in organic liquids. J Wood Sci 51:124–129CrossRefGoogle Scholar
  6. Obataya E, Ono T, Norimoto M (2000) Vibrational properties of wood along the grain. J Mater Sci 35 (12):2993–3001CrossRefGoogle Scholar
  7. Rowell RM (1982) Distribution of acetyl groups in southern pine reacted with acetic anhydride. Wood Sci 15(2):172–182Google Scholar
  8. Rowell RM (1991) Chemical modification of wood. In: Wood and cellulosic chemistry. Marcel Dekker, New YorkGoogle Scholar
  9. Rowell RM, Ellis WD (1978) Determination of the dimensional stabilization of wood using the water soak method. Wood Fiber Sci 10:104–111Google Scholar
  10. Rowell RM, Simonsen R, Hess S, Plackett DV, Cronshaw D, Dunningham E (1994) Acetyl distribution in acetylated whole wood and reactivity of isolated cell wall components to acetic anhydride. Wood Fiber Sci 26(1):11–18Google Scholar
  11. Skaar C (1988) Wood–water relations. Springer, Berlin Heidelberg New YorkGoogle Scholar
  12. Stamm AJ, Tarkow H (1947) Dimensional stabilization of wood. J Coll Chem 51:493–505CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Graduate School of Life and Environmental SciencesUniversity of TsukubaIbarakiJapan
  2. 2.Graduate School of AgricultureKyoto Prefectural UniversityKyotoJapan

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