습도조건에 따른 PEG 처리 수침고목재의 PEG 용출량 및 압축강도 변화
Changes in the Amount of PEG Free-Flowing Back from PEG-Treated Waterlogged Archaeological Wood and the Compressive Strength According to Relative Humidity Conditions
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
본 연구는 PEG 함침처리한 수침고목재를 대상으로 고습도(RH 90%)에서 저습도(RH 30%)로습도변화를 주면서 목재 내부에 있는 PEG 및 약제 용출량과 압축강도 특성 변화를 관찰하기 위해 수행되었다. 고습도에서 저습도로의 변화는 3회 실시하였다. 시험에 사용된 수침목재는 졸참나무류(Prinus group)이며, 함침 및 건조 방법은 1) PEG 완료농도 80% 및 자연건조(이하 PEG80), 2) PEG 완료농도 40% 및 진공동결건조(이하 PEG40), 그리고 3) t-butanol을 이용한 PEG 완료농도 40% 및진공동결건조(이하 TB40) 이다. 목재 내부에 있는 PEG는 3차 습도변화 이후에 대부분 용출되어 제거되었으며, 내강 벽면에 남은 PEG의 결정이 편평하게 고착되었다. 약제의 용출량은 대부분의 경우 습도변화 횟수가 증가할수록 그 양이 증가하였다. 습도조건에 따른 압축강도의 변화는 PEG80 과 TB40의 경우 습도변화 횟수가 증가할수록 증가하였으나, PEG40은 감소하였다. 본 연구를 통해PEG 처리된 수침고목재 보존을 위한 습도조건에 대한 계획 마련에 필요한 기초자료가 마련되었다.
Abstract
The present study aimed to monitor changes in the amount of PEG free-flowing back from PEG-treated woods and compressive strength changes with change in relative humidity from 90% to 30%. The change in the relative humidity was done 3 times. For the current study, water-logged wood (Prinus group) was used and the wooden blocks cut out of it were subjected to 3 different impregnation methods combined with different drying conditions as follows: 1) impregnating with 80% PEG#4000 followed by drying in nature (hereafter PEG80), 2) impregnating with 40% PEG#4000 and then drying in vacuum freeze drying equipment (hereafter PEG40), and 3) impregnating with 40% PEG#4000 in t-butanol, followed by drying in the vacuum freeze drying equipment (hereafter TB40). It was verified that most of the PEG was free-flowing back from the PEG-treated woods; however, a small amount of left PEG was observed on the lumen surface. The amount of PEG free-flowing back from the PEG-treated woods increased whenever the relative humidity changes from 90% to 30%. The compressive strengths of PEG80 and TB40 were increased whenever the relative humidity changed from 90% to 30%, whereas PEG40 decreased. The current study showed how to control the relative humidity to effectively manage PEG-treated waterlogged woods.
참고문헌 (25)
- Baird, J. A., "Effect of molecular weight, temperature, and additives on the moisture sorption properties of polyethylene glycol", Journal of Pharmaceutical Sciences, 99(1), pp.154~168 (2010)
- Giachi, G., "A methodological approach in the evaluation of the efficacy of treatments for the dimensional stabilisation of waterlogged archaeological wood", Journal of Cultural Heritage, 11(1), pp.91~101 (2010)
- Grattan, D. W., "A practical comparative study of several treatments for waterlogged wood", Studies in Conservation, 27(3), pp.124~136 (1982)
- 3–Waterlogged wood, "Grattan, D. W.", Conservation of marine archaeological objects, 55~67 (1987)
- 9-Conservation of waterlogged wood, "Grattan, D. W.", Conservation of marine archaeological objects, 164~206 (1987)
- Hollstein, E., "Jahrringchronologische datierungen von eichenhoelzern ohne waldkante", Bonner Jahrbuecher, 165, pp.12~27 (1965)
- 홍승현, "PEG 주입 침엽수 시편의 열처리 후 PEG 잔류량과 평형함수율 측정", 목재공학, 41(3), pp.173~180 (2013), 한국목재공학회[DOI]
- Jensen. P., "Dynamic LV-SEM analysis of freeze drying processes for waterlogged wood", Proceedings of the 8th ICOM Group on Wet Organic Archaeological Materials Conference, pp.319~333 (2001)
- Kang, A. K., "Micromorphological changes of waterlogged archaeological wood in PEG4000 and sucrose treatment", Conservation and Restoration of Cultural Heritage, 5(2), pp.3~14 (1996)
- Kaye, B., "Conservation of waterlogged archaeological wood", Chemical Society Reviews, 24(1), pp.35~43 (1995)
- Kim, G. S., "The vacuum freeze-drying experiment for water-logged wood excavated from Wolpyongdong in Taejon", Conservation Science in Museum, 1, pp.27~35 (1999)
- Kim, S. C., "Dimensional change of PEG-freeze dried waterlogged woods exposed at various humidity conditions", Journal of Conservation Science, 16, pp.110~118 (2004)
- Kim, S. C., "PEG Concentration and solvent selection for freeze-drying of waterlogged archaeological woods", Master, pp.2003
- 김수철, "PEG 처리 수침고목재의 농도 및 용매에 따른 압축강도 변화", 보존과학회지, 28(2), pp.95~99 (2012), 한국문화재보존과학회[DOI]
- Moon, W. S., "Strength test and adhesive strength test of P. E. G. Treated Wood", Conservation Studies, 8, pp.149~167 (1987)
- Murmanis, L., "Formation of tyloses in felled Quercus rubra L", Wood Science and Technology, 9(1), pp.3~14 (1975)
- Oh, S. W., "The Relationship between anatomical characteristics and compression strength parallel to grain in major species of Lepidobalanus", Journal of the Korean Wood Science and Technology, 26(1), pp.63~69 (1998)
- Park, S. J., "Studies on dimensional stabilization of water-logged small archaeological woods", Korea Science and Engineering Foundation, 36 (1997)
- Park, S. J., "Timber organization and identification", pp.209~ (2006), Hyangmunsa
- Schniewind, A. P., "Strength evaluation of deteriorated wood treated with consolidants", Studies in Conservation, 29(1), pp.146~150 (1987)
- Seo, J. H., "Conservation methodology for cultural heritage", pp.81~139 (2008), Kyunginmunhwasa
- Tahira, A., "Mechanical strength studies on degraded waterlogged wood treated with sugars", Studies in Conservation, 62(4), pp.223~228 (2017)
- The Samhan Institute of Cultural Properties, "The ruins of Goryeong Jik-ri and Sachon-ri", Academic Research Series, 76, pp.611~635 (2018)
- Yi, Y. H., "Conservation of waterlogged wooden finds excavated in wet-site", Journal of Conservation Science, 6(2), pp.126~140 (1997)
- Yi, Y. H., "Experiment on conservation treatment method(PEG, sucrose and lactitol)and degree of state-change with RH of waterlogged archaeological wood", Conservation Science in Museum, 2, pp.19~25 (2000)