Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy

The contact angles for Pinus (Pinus taeda), Erisma (Erisma uncinatum), Araucaria (Araucaria angustifolia) and Hymenaea (Hymenaea stilbocarpa) woods were obtained using four test liquids (water, diiodomethane, formamide, and ethylene glycol). The values of surface free energy were calculated for the...

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Autores principales:	Dos Santos,Sabrina N.C, Goncalves,Débora
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2016
Materias:	Adhesion contact angles hydrophobic woods wettability wood surfaces
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000200015
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spelling	oai:scielo:S0718-221X20160002000152016-05-13Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energyDos Santos,Sabrina N.CGoncalves,Débora Adhesion contact angles hydrophobic woods wettability wood surfaces The contact angles for Pinus (Pinus taeda), Erisma (Erisma uncinatum), Araucaria (Araucaria angustifolia) and Hymenaea (Hymenaea stilbocarpa) woods were obtained using four test liquids (water, diiodomethane, formamide, and ethylene glycol). The values of surface free energy were calculated for the heat-treated woods in order to analyze their changes in polar and non-polar (dispersive) components. According to the results of contact angles, surface free energies and surface polarities, the woods showed reduced wettability after heating treatment and become hydrophobic. Pinus and Araucaria were by far the most polar samples, since they presented low values of contact angle and high wettability (more hydrophilic). The approach used to calculate the surface free energy from the measurements of contact angle depends on the use of two, three or four test liquids, since different profiles were obtained for their polar and non-polar components. The surface characteristics for the wood samples were mainly defined based on polarity, which is an important parameter aiming at inferring when they are more polar (more hydrophobic), i.e. of great technological interest.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.18 n.2 20162016-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000200015en10.4067/S0718-221X2016005000035
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Adhesion contact angles hydrophobic woods wettability wood surfaces
spellingShingle	Adhesion contact angles hydrophobic woods wettability wood surfaces Dos Santos,Sabrina N.C Goncalves,Débora Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy
description	The contact angles for Pinus (Pinus taeda), Erisma (Erisma uncinatum), Araucaria (Araucaria angustifolia) and Hymenaea (Hymenaea stilbocarpa) woods were obtained using four test liquids (water, diiodomethane, formamide, and ethylene glycol). The values of surface free energy were calculated for the heat-treated woods in order to analyze their changes in polar and non-polar (dispersive) components. According to the results of contact angles, surface free energies and surface polarities, the woods showed reduced wettability after heating treatment and become hydrophobic. Pinus and Araucaria were by far the most polar samples, since they presented low values of contact angle and high wettability (more hydrophilic). The approach used to calculate the surface free energy from the measurements of contact angle depends on the use of two, three or four test liquids, since different profiles were obtained for their polar and non-polar components. The surface characteristics for the wood samples were mainly defined based on polarity, which is an important parameter aiming at inferring when they are more polar (more hydrophobic), i.e. of great technological interest.
author	Dos Santos,Sabrina N.C Goncalves,Débora
author_facet	Dos Santos,Sabrina N.C Goncalves,Débora
author_sort	Dos Santos,Sabrina N.C
title	Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy
title_short	Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy
title_full	Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy
title_fullStr	Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy
title_full_unstemmed	Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy
title_sort	variations in wettability on heat-treated wood surfaces: contact angles and surface free energy
publisher	Universidad del Bío-Bío
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000200015
work_keys_str_mv	AT dossantossabrinanc variationsinwettabilityonheattreatedwoodsurfacescontactanglesandsurfacefreeenergy AT goncalvesdebora variationsinwettabilityonheattreatedwoodsurfacescontactanglesandsurfacefreeenergy
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Variations in wettability on heat-treated wood surfaces: Contact angles and surface free energy

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