The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers

The study investigated the effects of short-term thermo-mechanical (STTM) densification temperature and pressure on changes in surface wettability of alder (Alnus glutinosa), beech (Fagus sylvatica), birch (Betula verrucosa) and pine (Pinus sylvestris) wood veneer. Veneer sheets were densified using...

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Autores principales:	Bekhta,Pavlo, Krystofiak,Tomasz
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2016
Materias:	Compression ratio contact angle mass loss short-term thermo-mechanical densification wettability wood veneer
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000100008
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spelling	oai:scielo:S0718-221X20160001000082016-03-30The influence of short-term thermo-mechanical densification on the surface wettability of wood veneersBekhta,PavloKrystofiak,Tomasz Compression ratio contact angle mass loss short-term thermo-mechanical densification wettability wood veneer The study investigated the effects of short-term thermo-mechanical (STTM) densification temperature and pressure on changes in surface wettability of alder (Alnus glutinosa), beech (Fagus sylvatica), birch (Betula verrucosa) and pine (Pinus sylvestris) wood veneer. Veneer sheets were densified using pressure levels of 4 MPa, 8 MPa and 12 MPa at three temperatures: 100°C, 150°C and 200°C for a short time of 4 min. Wettability was determined by measuring contact angles with distilled water. The results were compared with those of non-densified veneers. The results showed that in a relatively short process time wettability can be changed significantly. The wettability analysis showed that STTM-densified veneer surfaces became more hydrophobic, which indicates poor wettability. However, it was found that even STTM densification of veneers provides stable properties; in particular, contact angle values were stable for 24 hours after densification, which is an important consideration for industrial applications. The effect of temperature on the contact angle was more evident than that of pressure. Linear correlations were found between contact angle and both mass loss and compression ratio for all investigated wood species. These findings may be used to provide initial data for adhesive/coating application processes in woodworking industry.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.18 n.1 20162016-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000100008en10.4067/S0718-221X2016005000008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Compression ratio contact angle mass loss short-term thermo-mechanical densification wettability wood veneer
spellingShingle	Compression ratio contact angle mass loss short-term thermo-mechanical densification wettability wood veneer Bekhta,Pavlo Krystofiak,Tomasz The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
description	The study investigated the effects of short-term thermo-mechanical (STTM) densification temperature and pressure on changes in surface wettability of alder (Alnus glutinosa), beech (Fagus sylvatica), birch (Betula verrucosa) and pine (Pinus sylvestris) wood veneer. Veneer sheets were densified using pressure levels of 4 MPa, 8 MPa and 12 MPa at three temperatures: 100°C, 150°C and 200°C for a short time of 4 min. Wettability was determined by measuring contact angles with distilled water. The results were compared with those of non-densified veneers. The results showed that in a relatively short process time wettability can be changed significantly. The wettability analysis showed that STTM-densified veneer surfaces became more hydrophobic, which indicates poor wettability. However, it was found that even STTM densification of veneers provides stable properties; in particular, contact angle values were stable for 24 hours after densification, which is an important consideration for industrial applications. The effect of temperature on the contact angle was more evident than that of pressure. Linear correlations were found between contact angle and both mass loss and compression ratio for all investigated wood species. These findings may be used to provide initial data for adhesive/coating application processes in woodworking industry.
author	Bekhta,Pavlo Krystofiak,Tomasz
author_facet	Bekhta,Pavlo Krystofiak,Tomasz
author_sort	Bekhta,Pavlo
title	The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
title_short	The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
title_full	The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
title_fullStr	The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
title_full_unstemmed	The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
title_sort	influence of short-term thermo-mechanical densification on the surface wettability of wood veneers
publisher	Universidad del Bío-Bío
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2016000100008
work_keys_str_mv	AT bekhtapavlo theinfluenceofshorttermthermomechanicaldensificationonthesurfacewettabilityofwoodveneers AT krystofiaktomasz theinfluenceofshorttermthermomechanicaldensificationonthesurfacewettabilityofwoodveneers AT bekhtapavlo influenceofshorttermthermomechanicaldensificationonthesurfacewettabilityofwoodveneers AT krystofiaktomasz influenceofshorttermthermomechanicaldensificationonthesurfacewettabilityofwoodveneers
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The influence of short-term thermo-mechanical densification on the surface wettability of wood veneers

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