文献类型：期刊文献

英文题名：Effects of ageing on the cell wall and its hygroscopicity of wood in ancient timber construction

作者：Guo, Juan[1] Zhou, Haibin[1] Stevanic, Jasna S.[2] Dong, Mengyu[1] Yu, Min[1] Salmen, Lennart[2] Yin, Yafang[1]

第一作者：郭娟

通信作者：Salmen, L[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Dept Wood Anat & Utilizat, Beijing 100091, Peoples R China;[2]Res Inst Sweden, Bioecon Biorefinery & Energy, Box 5604, S-11486 Stockholm, Sweden

年份：2018

卷号：52

期号：1

起止页码：131-147

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20173804173751);Scopus(收录号：2-s2.0-85029418687);WOS:【SCI-EXPANDED(收录号:WOS:000419587400007)】；

基金：This work was funded by the Chinese National Natural Science Foundation (No. 31600450) and the State Administration of Foreign Experts Affairs P. R. China (P163036008). Professor Junji Sugiyama from University of Tokyo, Japan, is acknowledged for the discussion of XRD results, and Mrs. Anne-Mari Olsson from Research Institutes of Sweden, Sweden, is acknowledged for technical support of the dynamic vapour sorption measurement. The Wood Collection of Chinese Academy of Forestry and the Wallenberg Wood Science Center of KTH are acknowledged for the support of the study.

语种：英文

外文关键词：Cellulose - Crystallinity - Crystallites - Deterioration - Forestry - Fourier transform infrared spectroscopy - Glucose - Lignin - Moisture - Timber - Walls (structural partitions)

摘要：An important traditional load bearing member in oriental ancient timber structure buildings, i.e. Huagong (flower arm), was selected to explore the alterations in cell wall components and hygroscopic properties of wood during long time ageing. This archaeological poplar (Populus spp.) wood with cal. BP 690: BP 790 was studied from the wood surface and inwards by means of imaging FTIR spectroscopy, X-ray diffraction and dynamic vapour sorption. The deterioration of the archaeological wood mainly displayed a depolymerization of glucomannan and lignin as well as a hydrolysis of the glucuronic acid of xylan and of the aromatic C-O groups in the condensed lignins or lignin-carbohydrate complexes. Furthermore, the degradation promoted the rearrangement of the cellulose molecules in adjacent microfibrils. The cellulose crystallites in the archaeological wood were therefore packed more tightly and had larger diameter. The structural alterations of wood cell wall components and a decrease in crystallinity contributed to an increase in the number of moisture bonding sites and led to an increase in both the equilibrium moisture content of the archaeological wood in the entire RH range as well as an increase in hysteresis.