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09.11.2018 | Original Paper

Water distribution in wood after short term wetting

verfasst von: Mojca Žlahtič Zupanc, Urša Mikac, Igor Serša, Maks Merela, Miha Humar

Erschienen in: Cellulose | Ausgabe 2/2019

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Abstract

Water has a major influence on wood properties, especially dynamic moisture cycles, which affect the wood in outdoor applications. It is thus important to understand the penetration and distribution of water in wood. In this study, rainfall events were simulated to correspond to water immersion periods of 1 h. Specimens were imaged by magnetic resonance imaging (MRI) after 1 h of immersion. These measurements were used to determine the water distribution in the wood and to elucidate changes during the drying of specimens of five wood species: sweet chestnut heartwood (Castanea sativa), European larch heartwood (Larix decidua), Scots pine heartwood and sapwood (Pinus sylvestris) and Norway spruce (Picea abies). Both gravimetric and MRI analysis showed that after 1 h of immersion, pine sapwood took up the highest amount of water, followed by spruce wood. Considerably lower moisture contents were determined in pine heartwood, chestnut and larch, which correlated with a lower signal intensity. The outer parts of the specimens exhibited similar patterns with all of the specimens. The most variable results were the moisture content time profiles in the middle part of the specimens. Comparison of the MRI measurements and gravimetrically determined moisture contents during drying validated the MRI measurements and confirmed the method to be suitable for giving comprehensive information about the water drying kinetic.

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Vorheriger Artikel A critical review of cellulose-based nanomaterials for water purification in industrial processes

Nächster Artikel The parallel exponential kinetics model is unfit to characterize moisture sorption kinetics in cellulosic materials

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Titel: Water distribution in wood after short term wetting
verfasst von: Mojca Žlahtič Zupanc
Urša Mikac
Igor Serša
Maks Merela
Miha Humar
Publikationsdatum: 09.11.2018
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 2/2019
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-018-2102-y

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