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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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A novel method of acetylation of wood using supercritical carbon dioxide

Journal of Wood Science volume 56, pages 293–298 (2010)Cite this article

Abstract

Sugi heartwood was acetylated with acetic anhydride in supercritical carbon dioxide (CO2) (120°C or 130°C, 10–12 MPa). As a result, the weight percent gain increased with increasing acetylation time up to 16%–20% at 1 h and 24%–28% at 24 h. The antiswelling efficiency of the acetylated specimens reached 75%–80% at 3–4 h of acetylation. It is supposed that the acetylation in supercritical CO2 has a high bulking effect compared with liquid-phase and vapor-phase acetylation with uncatalyzed acetic anhydride. The results showed that the acetylation progressed rapidly because supercritical CO2 and acetic anhydride formed a single phase at more than 90°C, and the acetic anhydride reached the reaction sites in the wood quickly.

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Authors and Affiliations

  1. Department of Wood Improvement, Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki, 305-8687, Japan

    Masahiro Matsunaga, Yutaka Kataoka, Hiroshi Matsunaga & Hiroaki Matsui

Authors
  1. Masahiro Matsunaga
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  2. Yutaka Kataoka
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  3. Hiroshi Matsunaga
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  4. Hiroaki Matsui
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Correspondence to Masahiro Matsunaga.

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Matsunaga, M., Kataoka, Y., Matsunaga, H. et al. A novel method of acetylation of wood using supercritical carbon dioxide. J Wood Sci 56, 293–298 (2010). https://doi.org/10.1007/s10086-009-1098-1

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  • DOI: https://doi.org/10.1007/s10086-009-1098-1

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