보존과학회지 (Journal of Conservation Science)
- 제16권
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- Pages.110-118
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- 2004
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- 1225-5459(pISSN)
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- 2287-9781(eISSN)
PEG처리 후 동결건조한 수침고목재의 습도조건에 따른 상태변화
Dimensional Change of PEG-Freeze Dried Waterlogged Woods Exposed at Various Humidity Conditions
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Kim, Soo-Chul
(Conservation Science Laboratory, The National Museum of Korea) ;
- Park, Won-Kyu (School of Forest Resources, Chungbuk National University) ;
- Yi, Yong-Hee (Conservation Science Laboratory, The National Museum of Korea)
- 발행 : 2004.11.01
초록
열화가 많이 된 수침고목재(토탄층 물푸레나무)를 물과 t-butanol을 용매로 하여 PEG농도를
In order to evaluate two-step treatment of PEG-freeze drying for highly-degraded waterlogged ash woods (Fraxinus PP.; ca. 5,700 BP), which were excavated from peat lands in western Korea, dimension stability was examined during 45 months after complete treatment. The samples pre-treated with PEG in water solution showed better dimensional stabilities than the ones with PEG in t-butanol(TBA) solution. It suggests that TBA reduced the flexibility of wood cells and overflying by TBA induced micro-checks during freeze drying. Micro-checks results in fragile wood structures and consequently, large shrinkage by moisture absorbances of high PEG contents during exposure in humid condition. The results suggest that PEG in water-solution treatment is better than PEG in t-butanol as pretreament for freeze drying of highly-degraded waterlogged ash woods.
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