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Title: Cell wall domain and moisture content influence southern pine electrical conductivity

Source: Wood and Fiber Science

Author(s)Zelinka, Samuel L.; Passarini, Leandro; Colon Quintana, José L.; Glass, Samuel V.; Jakes, Joseph E.; Wiedenhoeft, Alex C.

Publication Year: 2016  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4707-2B  FPL-4715-1  FPL-4716-3A

Abstract: Recent work has highlighted the importance of movement of chemicals and ions through the wood cell wall. This movement depends strongly on moisture content and is necessary for structural damage mechanisms such as fastener corrosion and wood decay. Here, we present the first measurements of electrical resistance of southern pine at the subcellular level as a function of wood moisture content by using a 1-um-diameter probe. In latewood, measurements were taken in both the secondary cell wall (S2) and the cell corner compound middle lamella (CCCML).  In earlywood, measurements were only possible in the CCCML.  As expected, resistance decreased with increasing relative humidity (RH) in all locations. Resistance decreased more rapidly with relative humidity in the S2 layer than in any of the middle lamellae. These results give insight into how some moisture-dependent wood properties affecting ion movement may be partitioned across cell wall layers.

Keywords: wood-moisture relations, wood electrical properties, timber physics, percolation theory, wood damage mechanisms

Publication Review Process: Formally Refereed

File size: 3,072 kb(s)

Date posted: 09/15/2016

This publication is also viewable on Treesearch:  view
RITS Product ID: 81424
Current FPL Scientists associated with this product (listed alphabetically)
Glass, Samuel V.
Research Physical Scientist
Jakes, Joseph
Research Materials Engineer
Wiedenhoeft, Alex C.
Research Botanist
Zelinka, Samuel L.
Materials Research Engineer
  

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