Abstract
The origin of sorption hysteresis in the wood-water system is still under debate. In nanoporous-fluid systems, in general, hysteresis is explained as the manifestation of metastable states in a single pore-fluid system and that is further complicated by the pore connectivity. Cell walls are considered as micro-mesoporous materials and capillary condensation in the entire hygroscopic region is proposed as an alternative sorption mechanism. In the present work, the woods of Douglas-fir, aspen and western red cedar were in focus and the pore connectivity has been investigated by observing five experimentally generated hysteresis patterns comprised by up to 4th scanning curves at 25 and 40°C. Special attention was given to the congruency property from one pattern as it is known from the literature that deviation from this property can reveal the extent of pore connectivity. Consistent patterns were found for the species-temperature combinations. Further, the high extent of congruency property indicated the dominance of independent cell wall pores.
Funding: Natural Sciences and Engineering Council of Canada (NSERC) (Discovery Grant RGPIN-2016-04325).
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Carbon fibres from precursors produced by dry-jet wet-spinning of kraft lignin blended with kraft pulps
- Characterization of the precipitated lignin from Japanese beech as treated by semi-flow hot-compressed water
- Chemical effects of a mild torrefaction on the wood of eight Eucalyptus species
- Analysis of distribution of wood extractives in Gmelina arborea by gas chromatography and time-of-flight secondary ion mass spectrometry
- Water sorption hysteresis in wood: I review and experimental patterns – geometric characteristics of scanning curves
- Water sorption hysteresis in wood: II mathematical modeling – functions beyond data fitting
- Relations of density, polyethylene glycol treatment and moisture content with stiffness properties of Vasa oak samples
- Facile surface hydrophobization of medium-density fiberboard (MDF) by silver deposition
- Calibration of SilviScan data of Cryptomeria japonica wood concerning density and microfibril angles with NIR hyperspectral imaging with high spatial resolution
- Thermal diffusivity measurement of Phyllostachys edulis (Moso bamboo) by the flash method
- The effects of brown-rot decay on select wood properties of poplar (Populus cathayana Rehd.) and its mechanism of action
Articles in the same Issue
- Frontmatter
- Carbon fibres from precursors produced by dry-jet wet-spinning of kraft lignin blended with kraft pulps
- Characterization of the precipitated lignin from Japanese beech as treated by semi-flow hot-compressed water
- Chemical effects of a mild torrefaction on the wood of eight Eucalyptus species
- Analysis of distribution of wood extractives in Gmelina arborea by gas chromatography and time-of-flight secondary ion mass spectrometry
- Water sorption hysteresis in wood: I review and experimental patterns – geometric characteristics of scanning curves
- Water sorption hysteresis in wood: II mathematical modeling – functions beyond data fitting
- Relations of density, polyethylene glycol treatment and moisture content with stiffness properties of Vasa oak samples
- Facile surface hydrophobization of medium-density fiberboard (MDF) by silver deposition
- Calibration of SilviScan data of Cryptomeria japonica wood concerning density and microfibril angles with NIR hyperspectral imaging with high spatial resolution
- Thermal diffusivity measurement of Phyllostachys edulis (Moso bamboo) by the flash method
- The effects of brown-rot decay on select wood properties of poplar (Populus cathayana Rehd.) and its mechanism of action