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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
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Development of New Kinetics Models for Water Vapor Sorption in Wood

Schematic representation of moisture transport and gradients during the process of water vapor absorption. USDA Forest Service.
Schematic representation of moisture transport and gradients during the process of water vapor absorption. USDA Forest Service.
Snapshot: Wood is constantly exchanging water with its environment and these exchanges control nearly all of wood's amazing properties. Research has recently shown that this process is still not understood and old models that were thought to explain these processes are not physically valid.
Summary:

Water vapor sorption is the most fundamental aspect of wood-moisture relations. It is directly or indirectly related to the physical properties of wood and the onset of wood-damage mechanisms. While sorption properties of cellulosic materials have been utilized since antiquity, the time-dependent transition from one moisture content to another (i.e., sorption kinetics) has received much less attention. Researchers recently explored kinetic models of water vapor sorption in wood that have been developed over the past century. When rigorously tested, none of the models could match kinetic data, nor could they account for all of the physical phenomena observed in the water vapor sorption process of wood. Researchers concluded that new experimental techniques need to be developed to further advance our understanding of water in wood.
Princpal Investigator(s):
 Zelinka, Samuel L.
 Glass, Samuel V.
 Boardman, Charles R


Research Location:
  • Madison, WI


External Partners:
  • University of Copenhagen

Fiscal Year: 2019
Highlight ID: 1323
 
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