How much water can wood cell walls hold?: A triangulation approach to determine the maximum cell wall moisture content

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Thybring, Emil EngelundDepartment of Geosciences and Natural Resource Management, Biomass Science and Technology, Forest Nature and Biomass, University of Copenhagen, Frederiksberg, Denmark (author)

How much water can wood cell walls hold? : A triangulation approach to determine the maximum cell wall moisture content

Article/chapterEnglish2020

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2020-08-31
Public library science,2020
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:mau-18627
https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-18627URI
https://doi.org/10.1371/journal.pone.0238319DOI
https://lup.lub.lu.se/record/f64414d4-3a46-43b3-99cc-cb91e13ae075URI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Wood is a porous, hygroscopic material with engineering properties that depend significantly on the amount of water (moisture) in the material. Water in wood can be present in both cell walls and the porous void-structure of the material, but it is only water in cell walls that affects the engineering properties. An important characteristic of wood is therefore the capacity for water of its solid cell walls, i.e. the maximum cell wall moisture content. However, this quantity is not straight-forward to determine experimentally, and the measured value may depend on the experimental technique used. In this study, we used a triangulation approach to determine the maximum cell wall moisture content by using three experimental techniques based on different measurement principles: low-field nuclear magnetic resonance (LFNMR) relaxometry, differential scanning calorimetry (DSC), and the solute exclusion technique (SET). The LFNMR data were furthermore analysed by two varieties of exponential decay analysis. These techniques were used to determine the maximum cell wall moisture contents of nine different wood species, covering a wide range of densities. The results from statistical analysis showed that LFNMR yielded lower cell wall moisture contents than DSC and SET, which were fairly similar. Both of the latter methods include factors that could either under-estimate or over-estimate the measured cell wall moisture content. Because of this and the fact that the DSC and SET methods are based on different measurement principles, it is likely that they provide realistic values of the cell wall moisture content in the water-saturated state.

Subject headings and genre

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Trävetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Wood Science hsv//eng
TEKNIK OCH TEKNOLOGIER Materialteknik Annan materialteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Other Materials Engineering hsv//eng
fiber saturation point
bound water
phase-transitions
internal surface
cellulose
penetration; porosity
silica; pores
adsorption

Added entries (persons, corporate bodies, meetings, titles ...)

Digaitis, RamunasLund University,Lunds universitet,Avdelningen för Byggnadsmaterial,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Building Materials,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH,University of Copenhagen(Swepub:lu)ra1405di (author)
Nord-Larsen, ThomasDepartment of Geosciences and Natural Resource Management, Forest Resource Assessment and Bioenergy, Forest Nature and Biomass, University of Copenhagen, Frederiksberg, Denmark (author)
Beck, GreeleyDepartment of Wood Technology, Norwegian Institute of Bioeconomy Research, Ås, Norway,Norwegian Institute of Bioeconomy Research (Nibio) (author)
Fredriksson, MariaLund University,Lunds universitet,Avdelningen för Byggnadsmaterial,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Building Materials,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)bygg-mfe (author)
Department of Geosciences and Natural Resource Management, Biomass Science and Technology, Forest Nature and Biomass, University of Copenhagen, Frederiksberg, DenmarkAvdelningen för Byggnadsmaterial (creator_code:org_t)

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