Visualization of growing microcracks on the wood surface during drying under controlled environment
| Project/Area Number |
24688019
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Wood science
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| Research Institution | Kyushu University |
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Principal Investigator |
sakagami hiroki 九州大学, (連合)農学研究科(研究院), 助教 (40604822)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥27,430,000 (Direct Cost: ¥21,100,000、Indirect Cost: ¥6,330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2012: ¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
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| Keywords | 農林水産 / 可視化 / 環境材料 / 木材 / 乾燥 / 組織構造 / 割れ / マイクロクラック / スギ |
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| Outline of Final Research Achievements |
Microcracks on the wood surface during drying were visualized with a confocal lase scanning microscope equipped with a controlled environment chamber where temperature and relative humidity were kept at 50 °C and below 5% with time. No microcracks appeared on the tangential surface of Quercus serrata because the difference of moisture content between surface and interior was low in this experiment. I could succeed to visualize the emergence of microcracks of Cryptomeria japonica at different drying time using samples including heartwood, intermediate wood and sapwood. The first microcracks appeared in heartwood just after drying. Then, they appeared at intermediate wood. The time microcracks appeared in sapwood was seriously delayed. Macrocracks were found after microcracks adjacent annual rings at the same ray parenchyma connected each other. Ionic liquid whose vapor pressure is negligible restrained the shrinkage or microcracks occurring even if it was diluted around 10%.
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Report
(5 results)
Research Products
(4 results)
