Evaluation of Heat-treated Wood Produced in Supercritical Carbon Dioxide
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- Matsunaga Masahiro
- Forestry and Forest Research Institute
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- Kataoka Yutaka
- Forestry and Forest Research Institute
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- Matsunaga Hiroshi
- Forestry and Forest Research Institute
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- Ishikawa Atsuko
- Forestry and Forest Research Institute
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- Kobayashi Masahiko
- Forestry and Forest Research Institute
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- Kiguchi Makoto
- Forestry and Forest Research Institute
Bibliographic Information
- Other Title
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- 超臨界二酸化炭素雰囲気下で製造された熱処理木材の評価
- チョウリンカイ ニサンカ タンソ フンイキ カ デ セイゾウ サレタ ネツ ショリ モクザイ ノ ヒョウカ
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Abstract
This study investigated a new heat treatment process using supercritical carbon dioxide. Specimens were prepared from sugi heartwood. The specimens conditioned at three different moisture contents (0%, 11%, and 17%), were heated in supercritical carbon dioxide. As a result, weight loss and anti-swelling efficiency (ASE) increased with increasing treatment temperature and specimen moisture content. The maximum ASE of the heat-treated specimens reached approximately 70%. In contrast, the equilibrium moisture content (EMC) decreased with increasing treatment temperature and specimen moisture content. The results suggest that higher treatment temperature and moisture content may accelerate the thermolysis of wood components, especially hemicellulose, leading to a decrease in adsorption sites. It was also found that the wood specimens heat-treated in supercritical carbon dioxide have higher dimensional stability compared with those prepared by other conventional heat-treatment processes. In the case of heat-treatment under high pressure, it is thought that the water molecules in the specimen might be given high reactivity to accelerate the thermolysis of wood components.
Journal
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- Mokuzai Gakkaishi
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Mokuzai Gakkaishi 62 (1), 1-8, 2016
The Japan Wood Research Society
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Keywords
Details
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- CRID
- 1390282681328861440
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- NII Article ID
- 130005121548
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- NII Book ID
- AN00240329
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- ISSN
- 18807577
- 00214795
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- NDL BIB ID
- 027081072
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed