Even Visually Intact Cell Walls in Waterlogged Archaeological Wood Are Chemically Deteriorated and Mechanically Fragile: A Case of a 170 Year-Old Shipwreck

Show full item record



Permalink

http://hdl.handle.net/10138/313293

Citation

Han, L.; Tian, X.; Keplinger, T.; Zhou, H.; Li, R.; Svedström, K.; Burgert, I.; Yin, Y.; Guo, J. Even Visually Intact Cell Walls in Waterlogged Archaeological Wood Are Chemically Deteriorated and Mechanically Fragile: A Case of a 170 Year-Old Shipwreck. Molecules 2020, 25, 1113.

Title: Even Visually Intact Cell Walls in Waterlogged Archaeological Wood Are Chemically Deteriorated and Mechanically Fragile: A Case of a 170 Year-Old Shipwreck
Author: Han, Liuyang; Tian, Xingling; Keplinger, Tobias; Zhou, Haibin; Li, Ren; Svedström, Kirsi; Burgert, Ingo; Yin, Yafang; Guo, Juan
Publisher: Multidisciplinary Digital Publishing Institute
Date: 2020-03-03
URI: http://hdl.handle.net/10138/313293
Abstract: Structural and chemical deterioration and its impact on cell wall mechanics were investigated for visually intact cell walls (VICWs) in waterlogged archaeological wood (WAW). Cell wall mechanical properties were examined by nanoindentation without prior embedding. WAW showed more than 25% decrease of both hardness and elastic modulus. Changes of cell wall composition, cellulose crystallite structure and porosity were investigated by ATR-FTIR imaging, Raman imaging, wet chemistry, <sup>13</sup>C-solid state NMR, pyrolysis-GC/MS, wide angle X-ray scattering, and N<sub>2</sub> nitrogen adsorption. VICWs in WAW possessed a cleavage of carboxyl in side chains of xylan, a serious loss of polysaccharides, and a partial breakage of &beta;-O-4 interlinks in lignin. This was accompanied by a higher amount of mesopores in cell walls. Even VICWs in WAW were severely deteriorated at the nanoscale with impact on mechanics, which has strong implications for the conservation of archaeological shipwrecks.


Files in this item

Total number of downloads: Loading...

Files Size Format View
molecules-25-01113.pdf 4.598Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record