Abstract
The dimensional changes of the cell wall and cell lumens are revisited based on literature data and on the mathematical cylindrical model. The external swelling ratio in the cross-section of the wood cell is considered as a function of the moisture content (MC) m from the point of view of the swelling ratio of the cell wall, the swelling parameter k, which is defined as the ratio of the outer variation to the cell wall thickness variation, and the cell wall density ds. The swelling behavior of the cell lumen is evaluated based on the parameter k calculated from experimental observations, which accounts for both the swelling direction and variation degree of the lumen: the lumen radius (i) decreases at k<1, (ii) remains fixed at k=1, and (iii) increases at k>1. The derived equation was applied to 176 wood species from the literature, and it was found that 0.4<k<1.4, while in most cases 0.8<k<1.0. In other words, the lumen radius in most wood species is decreasing with water sorption. As expected, the S2 layer swelling is differently restricted in the circumferencial direction by the S1 and S3 layers with their different cell wall architecture.
Author contributions: Author has accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
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©2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
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- Dynamic mechanical analysis (DMA) of waterlogged archaeological wood at room temperature
- Obituary
- Professor Dr. Mikhail Yakovlevich Zarubin
Articles in the same Issue
- Frontmatter
- Original Articles
- Improved permeability of autohydrolyzed poplar sapwood against sodium hydroxide for CMP production
- Demethylation and other modifications of industrial softwood kraft lignin by laccase-mediators
- Activated carbon fiber from liquefied wood and polyvinyl butyral as an additive for production of flexible all-carbon yarn supercapacitors
- Short Note
- Fire retardancy of graphene oxide/wood composite (GOW) prepared by a vacuum-pulse dipping technique
- Original Articles
- Comparison of physical and thermal properties of various wood-inorganic composites (WICs) derived by the sol-gel process
- Radiata pine wood treatment with a dispersion of aqueous styrene/acrylic acid copolymer
- Density profiles of novel kraft pulp and TMP based foam formed thermal insulation materials observed by X-ray tomography and densitometry
- Influence of timber moisture content on wave time-of-flight and longitudinal natural frequency in coniferous species for different instruments
- Dimensional changes of cell wall and cell lumens upon water sorption revisited. Literature review and mathematical considerations based on the cylindrical model
- Dynamic mechanical analysis (DMA) of waterlogged archaeological wood at room temperature
- Obituary
- Professor Dr. Mikhail Yakovlevich Zarubin