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Fibers 2018, 6(3), 51; https://doi.org/10.3390/fib6030051

Heat and Mass Transfer Properties of Sugar Maple Wood Treated by the Thermo-Hygro-Mechanical Densification Process

1
Center de Recherche sur les Matériaux Renouvelables (Renewable Materials Research Center), Département des Sciences du Bois et de la Forêt (Department of Wood and Forest Science), Université Laval, Québec, QC G1V 0A6, Canada
2
Research Scientist, Service de Recherche et D’expertise en Transformation des Produits Forestiers (Research and Expertise Service on Transformation of Forest Products), Amqui, QC G5J 1K3, Canada
*
Author to whom correspondence should be addressed.
Received: 29 June 2018 / Revised: 13 July 2018 / Accepted: 17 July 2018 / Published: 24 July 2018
(This article belongs to the Special Issue Natural Fibre Biocomposites)
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Abstract

This study investigated the evolution of the density, gas permeability, and thermal conductivity of sugar maple wood during the thermo-hygro-mechanical densification process. The results suggested that the oven-dry average density of densified samples was significantly higher than that of the control samples. However, the oven-dry density did not show a linear increase with the decrease of wood samples thickness. The radial intrinsic gas permeability of the control samples was 5 to 40 times higher than that of densified samples, which indicated that the void volume of wood was reduced notably after the densification process. The thermal conductivity increased by 0.5–1.5 percent for an increase of one percent moisture content for densified samples. The thermal conductivity of densified wood was lower than that of the control samples. The densification time had significant effects on the oven-dry density and gas permeability. Both densification time and moisture content had significant effects on thermal conductivity but their interaction effect was not significant. View Full-Text
Keywords: density; gas permeability; thermal conductivity; densification density; gas permeability; thermal conductivity; densification
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Fu, Q.; Cloutier, A.; Laghdir, A. Heat and Mass Transfer Properties of Sugar Maple Wood Treated by the Thermo-Hygro-Mechanical Densification Process. Fibers 2018, 6, 51.

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