文献类型：期刊文献

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

作者：Han, Liuyang[1,2] Tian, Xingling[3] Keplinger, Tobias[4,5] Zhou, Haibin[6] Li, Ren[1,2] Svedstrom, Kirsi[7] Burgert, Ingo[4,5] Yin, Yafang[1,2] Guo, Juan[1,2]

第一作者：Han, Liuyang

通信作者：Guo, J[1];Guo, J[2]|[a0005c616682e38d4137f]郭娟;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Dept Wood Anat & Utilizat, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Wood Collect WOODPEDIA, Beijing 100091, Peoples R China;[3]Chinese Acad Cultural Heritage, Heritage Conservat & Restorat Inst, Beijing 100029, Peoples R China;[4]Swiss Fed Inst Technol, Wood Mat Sci, CH-8093 Zurich, Switzerland;[5]EMPA, Lab Cellulose & Wood Mat, CH-8600 Dubendorf, Switzerland;[6]Chinese Acad Forestry, Pilot Base, Beijing 102300, Peoples R China;[7]Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland

年份：2020

卷号：25

期号：5

外文期刊名：MOLECULES

收录：;Scopus(收录号：2-s2.0-85081224100);WOS:【SCI-EXPANDED(收录号:WOS:000529219900096)】；

基金：This work was funded by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF, grant number CAFYBB2018QB006, Chinese National Natural Science Foundation, grant number 31600450 and the scholarship from China Scholarship Council, grant number CSC201803270037.

语种：英文

外文关键词：waterlogged archaeological wood; cell wall structure; cell wall mechanics; deterioration; FTIR imaging; Raman imaging

摘要：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, C-13-solid state NMR, pyrolysis-GC/MS, wide angle X-ray scattering, and N-2 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.