Open AccessBook
Wood-water relations
TLDR
In this article, the authors discuss the relationship between wood and water, methods of measuring wood moisture content, factors which affect its equilibria, and the effect of moisture content on wood strength.Abstract:
Wood is formed in an essentially water-saturated environment in the living tree, and the cell wall remains in this state until the water flow from the roots is interrupted, such as by felling the tree. The wood then begins to lose most of its moisture by drying, resulting in changes in most of its physical properties. These changes, and their relationship to the environment to which the wood is subsequently ex posed, are the subject of this book. The text consists of six chapters. The first chapter discusses cer tain empirical relationships between wood and water, methods of measuring wood moisture content, factors which affect its equilib rium moisture content, and the effect of moisture content on wood strength. The second chapter treats the thermodynamics of moisture sorption by wood, inc1uding enthalpy, entropy, and free energy changes. The third chapter discusses some of the theories which have been proposed to explain the sorption isotherms for hygroscopic ma terials such as wood. Chapter 4 considers hygroexpansion or the shrinking and swelling of wood associated with moisture change. Chapter 5 is concerned with how moisture moves through the cell wall of wood in response to both moisture and temperature gradients. The sixth and final chapter discusses the theoretical and practical aspects of the electrical resistance and dielectric properties of wood, in c1uding the principles involved in their application in electrical moisture meters."read more
Citations
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Journal ArticleDOI
Adhesion and Surface Issues in Cellulose and Nanocellulose
TL;DR: A review of the scientific literature concerned with adhesion and surface properties of cellulose and nanocellulose can be found in this article, where the authors provide a review of some of the most relevant works.
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A critical discussion of the physics of wood–water interactions
TL;DR: The authors reviewed recent findings on wood-water interaction and put them into context of established knowledge in the field, and several new findings challenge prevalent theories and are critically discussed in an attempt to advance current knowledge and highlight gaps.
Moisture relations and physical properties of wood
TL;DR: In this article, the authors present properties of wood and wood-based products of particular concern to the architect and engineer, and discuss the design of wood-and woodbased products.
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Thermal conductivity and diffusivity of wood.
TL;DR: In this article, a model based on the ratio between heat conduction in parallel and serial layers of gas, liquid, and solid phases was proposed to explain the behavior of the effective thermal conductivity of Swedish wood.
Journal ArticleDOI
Water sorption on coals.
TL;DR: From the diffusion coefficient of water, which varied with increase in relative pressure, it is shown that water adsorbs first on primary sites, before formation of water clusters and their micropore filling which was a slow process.
References
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Journal ArticleDOI
Reciprocal Relations in Irreversible Processes. II.
TL;DR: In this article, a general reciprocal relation applicable to transport processes such as the conduction of heat and electricity, and diffusion, is derived from the assumption of microscopic reversibility, and certain average products of fluctuations are considered.
Journal ArticleDOI
Physical Adsorption on Non‐Uniform Surfaces
TL;DR: In this article, a quasi-chemical theory of interaction (BET) was used to analyze adsorption on a uniform surface and showed that the hypotheses of the BET theory lead to substantially no adorption beyond the first layer if E2 = EL, and stepwise isotherms if E1>E2>E3>···>EL.
Book
Transport processes in wood
TL;DR: In this paper, the effect of changes in pressure and temperature on relative Humidity of wood is investigated. But, the authors focus on the effects of these changes on the cell wall and not on the rest of the wood.