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Water vapour sorption characteristics and surface chemical composition of thermally modified spruce (Picea abies karst)
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.
Department of Forest Products Technology, Aalto University.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.
Aalto University, Finland.
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2016 (English)In: International Wood Products Journal, ISSN 2042-6445, E-ISSN 2042-6453Article in journal (Refereed) Published
Abstract [en]

The objective of this work was to study the hygroscopicity and surface chemical composition of thermally modified (TM) spruce. An effort was also made to study if those features were influenced by a previous exposure to a significant increase in relative humidity (RH). TM and unmodified Norway spruce (Picea abies Karst) samples, both in solid and ground form, were prepared. Water vapour sorption characteristics of the ground samples were obtained by measuring sorption isotherms using a dynamic vapour sorption (DVS). The surface chemical composition of the solid samples, both acetone extracted and non-extracted, were analysed using X-ray photoelectron spectroscopy (XPS). The DVS analysis indicated that the TM wood exposed to the 75% RH revealed a decrease in isotherm hysteresis. The XPS analysis indicated a decrease of acetone extractable or volatile organic components and a relative increase of non-extractable components for the samples exposed to the increased RH condition.

Place, publisher, year, edition, pages
Taylor & Francis, 2016.
Keyword [en]
Dynamic vapour sorption (DVS), Extractives, Norway spruce, Surface chemical composition, Thermally modified wood, X-ray photoelectron spectroscopy (XPS)
National Category
Materials Engineering Chemical Sciences Wood Science
Identifiers
URN: urn:nbn:se:kth:diva-188633DOI: 10.1080/20426445.2016.1160590ISI: 000382319700002OAI: oai:DiVA.org:kth-188633DiVA: diva2:937648
Note

QC 20160711

Available from: 2016-06-15 Created: 2016-06-15 Last updated: 2016-09-30Bibliographically approved

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Källbom, SusannaWålinder, MagnusSegerholm, KristofferLaine, Kristiina
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