文献类型：期刊文献

英文题名：Deterioration of the cell wall in waterlogged wooden archeological artifacts, 2400 years old

作者：Guo, Juan[1,2] Xiao, Lin[3,4] Han, Liuyang[1,2] Wu, Hao[4,5] Yang, Tao[3,4] Wu, Shunqing[4,5] Yin, Yafang[1,2]

第一作者：郭娟

通信作者：Yin, YF[1];Yin, YF[2]

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 WOODPLDIA, Beijing 100091, Peoples R China;[3]Chengdu Inst Cultural Rel & Archaeol, Chengdu 610072, Sichuan, Peoples R China;[4]State Adm Cultural Heritage Chengdu Workstn, Key Sci Res Base Excavated Wood & Lacquer Ware Co, Chengdu 610072, Sichuan, Peoples R China;[5]Jingzhou Conservat Ctr, Jingzhou 434020, Hubei, Peoples R China

年份：2019

卷号：40

期号：4

起止页码：820-844

外文期刊名：IAWA JOURNAL

收录：;Scopus(收录号：2-s2.0-85063970618);WOS:【SCI-EXPANDED(收录号:WOS:000497965500010)】；

基金：This work was supported by the Chinese National Natural Science Foundation [grant number 31600450] and the Fundamental Research Funds for the Central Non-profit Research Institution of CAF [grant number CAFYBB2018QB006]. Professor Xiaomei Jiang and Mr. Yonggang Zhang from the Research Institute of Wood Industry, Chinese Academy of Forestry, China are acknowledged for both the wood identification and the anatomical property assessment. Professor Guangjie Zhao from the Beijing Forestry University, China and Professor Lennart Salmen from Research Institutes of Sweden, are acknowledged for the discussion.

语种：英文

外文关键词：Waterlogged archeological wood; cell wall; chemical structure; cellulose crystallites; porous structure; water

摘要：The relationship between the cell wall ultrastructure of waterlogged wooden archeological artifacts and the state of water bound to cell walls and free in voids is fundamental to develop consolidating and drying technologies. Herein, a lacquer-wooden ware and a boat-coffin dating 4th century BC were selected as representative artifacts to study. Wood anatomy results indicated that they belonged to Idesia sp. and Machilus sp., respectively. They exhibited a typical spongy texture, as revealed by SEM observations, and their water contents had increased significantly. Solid state NMR, Py-GC/MS, imaging FTIR microscopy and 2D-XRD results demonstrated that the deterioration resulted from the partial cleavages of both polysaccharide backbones and cellulose hydrogen-bonding networks, almost complete elimination of acetyl side chains of hemicellulose, the partial depletion of beta-O-4 interlinks, as well as oxidation and demethylation/demethoxylation of lignin. These further caused the disoriented arrangement of crystalline cellulose, and the decrease in cellulose crystallite dimensions and crystallinity. In consequence, mesopores and macropores formed, and the number of moisture-adsorbed sites and their accessibility increased. Moreover, results on free water deduced by the changes of pore structure and the maximum monolayer water capacity achieved by the GAB model indicated that water in waterlogged archeological wooden artifacts was mainly free water in mesopores.