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Changes in the properties of wood cell walls during the transformation from sapwood to heartwood
Chinese Academy of Forestry, China.
Chinese Academy of Forestry, China.
RISE, Innventia.
Jiangxi Academy of Forestry, China.
Show others and affiliations
2014 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 49, no 4, p. 1734-1742Article in journal (Refereed) Published
Abstract [en]

Changes in the chemical, viscoelastic and hygroscopic properties of wood cell walls in Chinese fir (Cunninghamia lanceolata) during the transition from sapwood to heartwood were studied to provide insights into the formation of heartwood. In situ imaging FTIR measurements indicated that the composition of the main components of cell walls remained almost unaltered, but more extractives were deposited in the wood cell walls during the sapwood-heartwood transition. Compared to the sapwood and transition wood, the heartwood had a higher softening temperature and greater activation energy, suggesting that the mobility restrictions of cell wall biopolymers were due to extractives obstructing the accessing of the plasticizer (ethylene glycol). The moisture sorption was the same from the sapwood to heartwood at a low relative humidity (RH), while the heartwood adsorbed less water at a high RH, probably caused by the extractives deposited in the matrix and mesopores of heartwood cell walls.

Place, publisher, year, edition, pages
2014. Vol. 49, no 4, p. 1734-1742
National Category
Forest Science
Identifiers
URN: urn:nbn:se:ri:diva-9824DOI: 10.1007/s10853-013-7860-1Scopus ID: 2-s2.0-84891625342OAI: oai:DiVA.org:ri-9824DiVA, id: diva2:968609
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2020-12-01Bibliographically approved

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