The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties

In this paper the effect of heat and ammonia treatment on the change in colour of oak wood (Quercus robur.) and comparison of physical and mechanical properties were investigated. Wood specimens were made from heartwood and sapwood in dimensions 30×30×30 mm³. The specimens were subjected to heat tre...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Čermák,Petr, Dejmal,Aleš
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2013
Materias:	Ammonia treatment CIELAB colour change density equilibrium moisture content Janka hardness heat treatment modulus of elasticity Quercus sp
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2013000300010
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-221X2013000300010
record_format	dspace
spelling	oai:scielo:S0718-221X20130003000102014-09-16The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical propertiesČermák,PetrDejmal,Aleš Ammonia treatment CIELAB colour change density equilibrium moisture content Janka hardness heat treatment modulus of elasticity Quercus sp In this paper the effect of heat and ammonia treatment on the change in colour of oak wood (Quercus robur.) and comparison of physical and mechanical properties were investigated. Wood specimens were made from heartwood and sapwood in dimensions 30×30×30 mm³. The specimens were subjected to heat treatment at 180°C and 230°C for 2 and 4 hours, others were treated by ammonia for 24 hours. After these processes, CIELAB colour, hardness, EMC, density and MOE of wood were tested in comparison with untreated samples. The results show that the heat treatment contributed to darkening of sapwood and heartwood and the total colour change increased up to 38.47 units (CIELAB) in the radial direction and 37.75 units (CIELAB) in the tangential direction. Previous research into ammonia treatment shows that the most significant changes were noticed after 1 day. The colour changes between sapwood and heartwood were more noticeable in ammonia treatment than in the case of heat treatment. All other observed properties were decreased in the case of heat treatment. Ammonia treatment does not have a significant influence on the other observed properties. The results proved that ammonia treatment is a modification that improves the decorative value but has a minimal effect on technologically relevant properties of solid wood. Nevertheless, the heat treatment can be used as comparable process for colour change of wood.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.15 n.3 20132013-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2013000300010en10.4067/S0718-221X2013005000029
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ammonia treatment CIELAB colour change density equilibrium moisture content Janka hardness heat treatment modulus of elasticity Quercus sp
spellingShingle	Ammonia treatment CIELAB colour change density equilibrium moisture content Janka hardness heat treatment modulus of elasticity Quercus sp Čermák,Petr Dejmal,Aleš The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties
description	In this paper the effect of heat and ammonia treatment on the change in colour of oak wood (Quercus robur.) and comparison of physical and mechanical properties were investigated. Wood specimens were made from heartwood and sapwood in dimensions 30×30×30 mm³. The specimens were subjected to heat treatment at 180°C and 230°C for 2 and 4 hours, others were treated by ammonia for 24 hours. After these processes, CIELAB colour, hardness, EMC, density and MOE of wood were tested in comparison with untreated samples. The results show that the heat treatment contributed to darkening of sapwood and heartwood and the total colour change increased up to 38.47 units (CIELAB) in the radial direction and 37.75 units (CIELAB) in the tangential direction. Previous research into ammonia treatment shows that the most significant changes were noticed after 1 day. The colour changes between sapwood and heartwood were more noticeable in ammonia treatment than in the case of heat treatment. All other observed properties were decreased in the case of heat treatment. Ammonia treatment does not have a significant influence on the other observed properties. The results proved that ammonia treatment is a modification that improves the decorative value but has a minimal effect on technologically relevant properties of solid wood. Nevertheless, the heat treatment can be used as comparable process for colour change of wood.
author	Čermák,Petr Dejmal,Aleš
author_facet	Čermák,Petr Dejmal,Aleš
author_sort	Čermák,Petr
title	The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties
title_short	The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties
title_full	The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties
title_fullStr	The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties
title_full_unstemmed	The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties
title_sort	effect of heat and ammonia treatment on colour response of oak wood (quercus robur) and comparison of some physical and mechanical properties
publisher	Universidad del Bío-Bío
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2013000300010
work_keys_str_mv	AT 268ermakpetr theeffectofheatandammoniatreatmentoncolourresponseofoakwoodquercusroburandcomparisonofsomephysicalandmechanicalproperties AT dejmalale353 theeffectofheatandammoniatreatmentoncolourresponseofoakwoodquercusroburandcomparisonofsomephysicalandmechanicalproperties AT 268ermakpetr effectofheatandammoniatreatmentoncolourresponseofoakwoodquercusroburandcomparisonofsomephysicalandmechanicalproperties AT dejmalale353 effectofheatandammoniatreatmentoncolourresponseofoakwoodquercusroburandcomparisonofsomephysicalandmechanicalproperties
_version_	1714202570601267200

The effect of heat and ammonia treatment on colour response of oak wood (Quercus robur) and comparison of some physical and mechanical properties

Ejemplares similares