Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure

Abstract: Water is one of the most significant factors for the durability of wood. A common solution is to use a coating to protect and maintain low water content. However, little knowledge exists how the underlying wood substrate affects the water sorption of coated wood. Therefore, the liquid wate...

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Autores principales:	Sjökvist,Tinh, Blom,Åsa, Ahmed,Sheikh Ali
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2020
Materias:	Alkyd acrylic coating permeability linseed oil moisture content Picea abies wood durability
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2020000300335
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spelling	oai:scielo:S0718-221X20200003003352020-06-26Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposureSjökvist,TinhBlom,ÅsaAhmed,Sheikh Ali Alkyd acrylic coating permeability linseed oil moisture content Picea abies wood durability Abstract: Water is one of the most significant factors for the durability of wood. A common solution is to use a coating to protect and maintain low water content. However, little knowledge exists how the underlying wood substrate affects the water sorption of coated wood. Therefore, the liquid water absorption of coated and uncoated Norway spruce heartwood and sapwood with a variety of densities was measured by letting the panels float freely in the water. The effect of one year weathering of the coatings was also included. Coated heartwood and sapwood had no difference in water absorption in opposite to uncoated spruce. The influence of heartwood and sapwood seemed to have limited impact when a coating hindered the presence of free water. Wood density had a positive effect on the absorption of coated wood, i.e. low absorption for low-density samples, in opposite to uncoated samples. Low-density characteristic also contributed to a lower increase of water absorption after weather degradation, for samples with water-borne coatings. Natural weathering enhanced the effect of wood characteristics on coated samples, likely by an increase of coating permeability.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.22 n.3 20202020-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2020000300335en10.4067/S0718-221X2020005000308
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Alkyd acrylic coating permeability linseed oil moisture content Picea abies wood durability
spellingShingle	Alkyd acrylic coating permeability linseed oil moisture content Picea abies wood durability Sjökvist,Tinh Blom,Åsa Ahmed,Sheikh Ali Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure
description	Abstract: Water is one of the most significant factors for the durability of wood. A common solution is to use a coating to protect and maintain low water content. However, little knowledge exists how the underlying wood substrate affects the water sorption of coated wood. Therefore, the liquid water absorption of coated and uncoated Norway spruce heartwood and sapwood with a variety of densities was measured by letting the panels float freely in the water. The effect of one year weathering of the coatings was also included. Coated heartwood and sapwood had no difference in water absorption in opposite to uncoated spruce. The influence of heartwood and sapwood seemed to have limited impact when a coating hindered the presence of free water. Wood density had a positive effect on the absorption of coated wood, i.e. low absorption for low-density samples, in opposite to uncoated samples. Low-density characteristic also contributed to a lower increase of water absorption after weather degradation, for samples with water-borne coatings. Natural weathering enhanced the effect of wood characteristics on coated samples, likely by an increase of coating permeability.
author	Sjökvist,Tinh Blom,Åsa Ahmed,Sheikh Ali
author_facet	Sjökvist,Tinh Blom,Åsa Ahmed,Sheikh Ali
author_sort	Sjökvist,Tinh
title	Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure
title_short	Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure
title_full	Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure
title_fullStr	Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure
title_full_unstemmed	Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure
title_sort	liquid water absorption in coated norway spruce: impact of heartwood, sapwood, density and weather exposure
publisher	Universidad del Bío-Bío
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2020000300335
work_keys_str_mv	AT sjokvisttinh liquidwaterabsorptionincoatednorwayspruceimpactofheartwoodsapwooddensityandweatherexposure AT blomasa liquidwaterabsorptionincoatednorwayspruceimpactofheartwoodsapwooddensityandweatherexposure AT ahmedsheikhali liquidwaterabsorptionincoatednorwayspruceimpactofheartwoodsapwooddensityandweatherexposure
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Liquid water absorption in coated Norway spruce: Impact of heartwood, sapwood, density and weather exposure

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