文献类型：期刊文献

英文题名：Multi-scale structural deterioration analysis of archaeological wood from the Shahe Ancient Bridge site in Xi'an, Shaanxi, China

作者：Chu, Shimin[1] Lin, Lanying[1] Wang, Dong[2]

第一作者：Chu, Shimin

通信作者：Lin, LY[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Northwestern Polytech Univ Culture & Heritage, Xian, Peoples R China

年份：2024

外文期刊名：WOOD MATERIAL SCIENCE & ENGINEERING

收录：;EI(收录号：20243116770216);Scopus(收录号：2-s2.0-85199552411);WOS:【SCI-EXPANDED(收录号:WOS:001275348800001)】；

基金：The authors are grateful the financial support from the Fundamental Research Funds for the Central Universities [grant number D5000210672], the Youth open project of Emperor Qinshihuang's Mausoleum Site Museum, and the Chinese Academy of Forestry Fundamental Research Fund [grant number CAFYBB2023PA004].

语种：英文

外文关键词：Shahe Ancient Bridge site; wood piles; wood cell walls; deterioration

摘要：Due to the unstable variations in moisture content, the wood piles near the ground surface at Shahe Ancient Bridge site have undergone more severe degradation. In this study, two representative wood piles from the site were selected as samples to analyze their deterioration from a multi-scale perspective. The findings suggested that the primary microorganisms of the wood piles contained not only white rot and brown rot fungi commonly found in dry archaeological wood, but also soft rot fungi and erosive bacteria commonly found in waterlogged archaeological wood. The hemicellulose and non-crystalline cellulose were almost completely degraded, and even the cellulose in the crystalline zone underwent some degradation. The microfibrils were fragmented and disoriented. The beta-O-4 and beta-beta bonds in lignin were partially broken, resulting in a decrease in the molecular weight of the lignin. Compared to G-type lignin, S-type lignin demonstrated a higher susceptibility to degradation, potentially explaining why Phoebe sp. wood underwent more extensive degradation than Abies sp. wood. Archaeological wood was not rich in mesopores compared to the reference wood. The results of this study contribute to the understanding of the deterioration state of the Shahe Ancient Bridge site and provide a fundamental understanding for its subsequent protection.