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http://dx.doi.org/10.12654/JCS.2017.33.1.05

Chemical Characteristics of Timbers from the Yeongheungdo Shipwreck  

Cha, Mi Young (Underwater Excavation & Conservation Division, National Research Institute of Maritime Cultural Heritage)
Publication Information
Journal of Conservation Science / v.33, no.1, 2017 , pp. 35-42 More about this Journal
Abstract
The Yeongheungdo shipwreck was excavated in the sea of Seomeopbeol, Ongjin-gun, Incheon, Korea. Chemical characterization of timbers from the shipwreck occurred via maximum moisture content, chemical composition, FT-IR, solid state $^{13}C$ NMR, and XRD analyses. As maximum moisture content of the outer part of the timbers averaged 623%, a phenomenon in that lignin increased relatively, according to the decrease in cellulose, and the ash content increased, which is typical of waterlogged archaeological wood was shown. The results from the FT-IR and solid state $^{13}C$ NMR analyses showed that the cellulose band of the outer part had disappeared or had remarkably decreased. In addition, the bands assigned to lignin dramatically increased. However, regarding the inner part of the timbers, hemicellulose and some crystalline cellulose and amorphous cellulose bands decreased. Therefore, a large difference exists between the degradation levels of the outer and inner parts of the timbers of the Yeongheungdo shipwreck.
Keywords
Waterlogged archaeological wood; Cellulose; Lignin; Degradation; Yeongheungdo shipwreck;
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