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Liquid sorption characterisation of Norway spruce heartwood and sapwood using a muiticycle Wilhelmy plate method
Linnaeus Univ, Dept Forestry & Wood Technol, SE-35195 Vaxjo, Sweden..
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.
Linnaeus Univ, Dept Forestry & Wood Technol, SE-35195 Vaxjo, Sweden..
2018 (English)In: International Wood Products Journal, ISSN 2042-6445, E-ISSN 2042-6453, Vol. 9, no 2, p. 58-65Article in journal (Refereed) Published
Abstract [en]

A multicycle Wilhelmy plate method was applied to study the water and octane sorption behaviour of small Norway spruce veneers. Dry heart- and sapwood samples of varying density were investigated. The results showed a correlation between the porosity and the sorption of octane for all samples, i.e. a higher wood porosity resulted in higher octane sorption. However, no difference in octane sorption was found between heart- and sapwood samples of similar density. The water sorption behaviour was difficult to interpret, probably due to the influence of surface-active wood extractives. It is suggested that the presence of such extractives, particularly in the sapwood samples, increases the sorption of water due to a significant decrease in its apparent surface tension. Hence, the results indicate that the liquid water sorption of spruce heart- and sapwood is strongly influenced by variations in the extractives content rather than by the micromorphology.

Place, publisher, year, edition, pages
Taylor & Francis, 2018. Vol. 9, no 2, p. 58-65
Keywords [en]
Picea abies, water, octane, extractives, permeability, pit aspiration, coating and durability
National Category
Wood Science
Identifiers
URN: urn:nbn:se:kth:diva-233435DOI: 10.1080/20426445.2018.1467602ISI: 000440888400004Scopus ID: 2-s2.0-85046402339OAI: oai:DiVA.org:kth-233435DiVA, id: diva2:1239933
Funder
Swedish Research Council Formas, 2014-172
Note

QC 20180820

Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2018-10-31Bibliographically approved

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CiteExportLink to record
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