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Effects of ageing on the cell wall and its hygroscopicity of wood in ancient timber construction
Chinese Academy of Forestry, China.
Chinese Academy of Forestry, China.
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.ORCID iD: 0000-0002-1341-0266
Chinese Academy of Forestry, China.
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2018 (English)In: Wood Science and Technology, ISSN 0043-7719, E-ISSN 1432-5225, Vol. 52, no 1, p. 131-147Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2018. Vol. 52, no 1, p. 131-147
Keywords [en]
Cellulose, Forestry, Fourier transform infrared spectroscopy, Glucose, Lignin, Moisture, Timber, Walls (structural partitions), Wooden construction, X ray diffraction, Ancient timber structures, Archaeological woods, Cell-wall components, Cellulose crystallites, Dynamic vapour sorptions, Equilibrium moisture contents, Hygroscopic properties, Structural alterations, Wood, Aging, Cell Walls, Construction, Crystallinity, Hysteresis, Moisture Content, Populus, Xylans
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-36583DOI: 10.1007/s00226-017-0956-zScopus ID: 2-s2.0-85029418687OAI: oai:DiVA.org:ri-36583DiVA, id: diva2:1268778
Note

Funding details: State Administration of Foreign Experts Affairs, SAFEA, P163036008; Funding details: University of Tokyo; Funding details: National Natural Science Foundation of China, NSFC, 31600450;

Available from: 2018-12-06 Created: 2018-12-06 Last updated: 2018-12-06Bibliographically approved

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Stevanic Srndovic, JasnaSalmen, Lennart

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