文献类型：期刊文献

英文题名：Evaluation of PEG and sugars consolidated fragile waterlogged archaeological wood using nanoindentation and ATR-FTIR imaging

作者：Han, Liuyang[1,2,3] Guo, Juan[2,3] Tian, Xingling[4] Jiang, Xiaomei[2,3] Yin, Yafang[2,3]

第一作者：Han, Liuyang

通信作者：Guo, J[1]

机构：[1]Univ Sci & Technol Beijing, Inst Cultural Heritage & Hist Sci & Technol, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Wood Collect Chinese Acad Forestry, Beijing 100091, Peoples R China;[4]Chinese Acad Cultural Heritage, Heritage Conservat & Restorat Inst, Beijing 100029, Peoples R China

年份：2022

卷号：170

外文期刊名：INTERNATIONAL BIODETERIORATION & BIODEGRADATION

收录：;EI(收录号：20220911736087);Scopus(收录号：2-s2.0-85125441702);WOS:【SCI-EXPANDED(收录号:WOS:000927855000003)】；

基金：This work was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF [grant number CAFYBB2018QB006] and China Postdoctoral Science Foundation [grant number 2020M680337].

语种：英文

外文关键词：Waterlogged archaeological wood; Micromechanical property; Morphological structure; Thermogravimetric analysis; The Xiaobaijiao I shipwreck

摘要：Waterlogged archaeological wood (WAW) undergoes biological deterioration during long-term immersion in microorganisms-rich aquatic environments. The consolidants are commonly applied to avoid wood deformation upon drying. It is urgent to develop a systematic evaluation method to study the impact of the consolidant distribution and the intermolecular interactions among consolidants and cell wall components on the improvement of wood mechanical traits. In order to evaluate the effect of consolidant distribution and intermolecular interactions between consolidants and cell wall components on the mechanical improvement, herein, we proposed in situ analysis methods involving Nanoindentation (NI) technology (without prior embedding) along with attenuated total reflection Fourier transform infrared imaging (ATR-FTIR imaging). Moreover, PEG, sucralose, and trehalose were chosen as representative consolidants to treat moderately deteriorated WAW because of their different molecular weights and different hydrophilic groups. Results showed that the mechanical improvement in consolidated WAW was significant. The elastic modulus and hardness of WAW after consolidation with PEG, sucralose and trehalose increased, with improvements of 15.3% and 34.8%, 43.9% and 49.5%, 31.9% and 6.4%, respectively, compared to untreated WAW. All three consolidants were found under scanning electron microscopy (SEM) to have filled wood cell lumens and mesopores in cell walls to different extents. ATR-FTIR imaging and thermogravimetric analysis (TGA) results further indicated that consolidants partly penetrated the wood cell walls. PEG was more concentrated near the fiber lumina. In addition, TGA revealed that the relative contents of PEG and trehalose in consolidated archaeological woods were 54.0% and 39.8%, and the maximum decomposition temperature (Td) of consolidated WAW all differed from the untreated WAW, which suggested non-covalent intermolecular interactions were probably presented between consolidants and WAW cell wall components.