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http://dx.doi.org/10.12654/JCS.2020.36.3.07

Changes in the Amount of PEG Free-Flowing Back from PEG-Treated Waterlogged Archaeological Wood and the Compressive Strength According to Relative Humidity Conditions  

Jo, Ah Hyeon (Cultural Heritage Conservation Science Center, National Research Institute of Cultural Heritage)
Lee, Kwang-Hee (Research Institute of Wooden Cultural Heritage, Korea National University of Cultural Heritage)
Choi, Tae-Ho (Department of Wood and Paper Science, Chungbuk National University)
Go, In Hee (Department of Conservation Heritage Science, Chungbuk National University)
Seo, Jeong-Wook (Department of Wood and Paper Science, Chungbuk National University)
Publication Information
Journal of Conservation Science / v.36, no.3, 2020 , pp. 225-235 More about this Journal
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.
Keywords
Waterlogged wood; PEG(Polyethylene glycol); Oak; Relative humidity; Compressive strength;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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