The quality comparison of particleboards produced from heartwood and sapwood of European larch

Abstract: In this paper, the impacts of heartwood and sapwood usage on the physical, mechanical, and surface properties and formaldehyde emission of particleboard are investigated. European Larch (Larix decidua) trees are chosen as a raw material. The logs are divided into three segments: sapwood, h...

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Autores principales:	Bardak,Selahattin, Nemli,Gökay, Bardak,Timuçin
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2019
Materias:	Contact angle formaldehyde emission Larix decidua mechanical properties physical properties roughness.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000400511
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spelling	oai:scielo:S0718-221X20190004005112019-09-30The quality comparison of particleboards produced from heartwood and sapwood of European larchBardak,SelahattinNemli,GökayBardak,Timuçin Contact angle formaldehyde emission Larix decidua mechanical properties physical properties roughness. Abstract: In this paper, the impacts of heartwood and sapwood usage on the physical, mechanical, and surface properties and formaldehyde emission of particleboard are investigated. European Larch (Larix decidua) trees are chosen as a raw material. The logs are divided into three segments: sapwood, heartwood and total wood. The highest amounts of cellulose (51,54%), and hemicelluloses (22,24%) in the sapwood, followed by total wood, and the heartwood, respectively. However, the highest amount of lignin (30,54%) was found in the heartwood. The highest extractives values are obtained from heartwood, followed by total wood, and the sapwood, respectively. While the lowest pH value (3,03) is found in heartwood, the sapwood samples provide the highest values (4,95). The highest ash (0,49%) content and amount of condensed tannin (13,89%) are extracted from heartwood, followed by total wood, and sapwood, respectively. The test panels manufactured from sapwood have the smoothest surface (7,49 µm (Ra), 48,86 µm (Ry), and 35,12 µm (Rz)) and the lowest contact angles (67,8°), while the roughest surface (14,20 µm (Ra), 68,05 µm (Ry), and 50,02 µm (Rz)) and highest contact angle (96,9°) are obtained from the panels of heartwood. The thickness swelling (19,88%) and formaldehyde emission (7,28%) values of the panels manufactured from heartwood are significantly lower than the panels manufactured from the total wood and sapwood. The highest modulus of rupture (MOR), modulus of elasticity (MOE), and internal bond (IB) values are observed on sapwood, respectively, 15,60 MPa (MOR), 2201 MPa (MOE), and 0,523 MPa (IB). These mechanical strength values (MOR, MOE, and IB) are followed by total wood, and the heartwood, respectively. Surface smoothness and wettability of the particleboards manufactured from sapwood are better than those of total wood and heartwood.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.21 n.4 20192019-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000400511en10.4067/S0718-221X2019005000407
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Contact angle formaldehyde emission Larix decidua mechanical properties physical properties roughness.
spellingShingle	Contact angle formaldehyde emission Larix decidua mechanical properties physical properties roughness. Bardak,Selahattin Nemli,Gökay Bardak,Timuçin The quality comparison of particleboards produced from heartwood and sapwood of European larch
description	Abstract: In this paper, the impacts of heartwood and sapwood usage on the physical, mechanical, and surface properties and formaldehyde emission of particleboard are investigated. European Larch (Larix decidua) trees are chosen as a raw material. The logs are divided into three segments: sapwood, heartwood and total wood. The highest amounts of cellulose (51,54%), and hemicelluloses (22,24%) in the sapwood, followed by total wood, and the heartwood, respectively. However, the highest amount of lignin (30,54%) was found in the heartwood. The highest extractives values are obtained from heartwood, followed by total wood, and the sapwood, respectively. While the lowest pH value (3,03) is found in heartwood, the sapwood samples provide the highest values (4,95). The highest ash (0,49%) content and amount of condensed tannin (13,89%) are extracted from heartwood, followed by total wood, and sapwood, respectively. The test panels manufactured from sapwood have the smoothest surface (7,49 µm (Ra), 48,86 µm (Ry), and 35,12 µm (Rz)) and the lowest contact angles (67,8°), while the roughest surface (14,20 µm (Ra), 68,05 µm (Ry), and 50,02 µm (Rz)) and highest contact angle (96,9°) are obtained from the panels of heartwood. The thickness swelling (19,88%) and formaldehyde emission (7,28%) values of the panels manufactured from heartwood are significantly lower than the panels manufactured from the total wood and sapwood. The highest modulus of rupture (MOR), modulus of elasticity (MOE), and internal bond (IB) values are observed on sapwood, respectively, 15,60 MPa (MOR), 2201 MPa (MOE), and 0,523 MPa (IB). These mechanical strength values (MOR, MOE, and IB) are followed by total wood, and the heartwood, respectively. Surface smoothness and wettability of the particleboards manufactured from sapwood are better than those of total wood and heartwood.
author	Bardak,Selahattin Nemli,Gökay Bardak,Timuçin
author_facet	Bardak,Selahattin Nemli,Gökay Bardak,Timuçin
author_sort	Bardak,Selahattin
title	The quality comparison of particleboards produced from heartwood and sapwood of European larch
title_short	The quality comparison of particleboards produced from heartwood and sapwood of European larch
title_full	The quality comparison of particleboards produced from heartwood and sapwood of European larch
title_fullStr	The quality comparison of particleboards produced from heartwood and sapwood of European larch
title_full_unstemmed	The quality comparison of particleboards produced from heartwood and sapwood of European larch
title_sort	quality comparison of particleboards produced from heartwood and sapwood of european larch
publisher	Universidad del Bío-Bío
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000400511
work_keys_str_mv	AT bardakselahattin thequalitycomparisonofparticleboardsproducedfromheartwoodandsapwoodofeuropeanlarch AT nemligokay thequalitycomparisonofparticleboardsproducedfromheartwoodandsapwoodofeuropeanlarch AT bardaktimucin thequalitycomparisonofparticleboardsproducedfromheartwoodandsapwoodofeuropeanlarch AT bardakselahattin qualitycomparisonofparticleboardsproducedfromheartwoodandsapwoodofeuropeanlarch AT nemligokay qualitycomparisonofparticleboardsproducedfromheartwoodandsapwoodofeuropeanlarch AT bardaktimucin qualitycomparisonofparticleboardsproducedfromheartwoodandsapwoodofeuropeanlarch
_version_	1714202678561603584

The quality comparison of particleboards produced from heartwood and sapwood of European larch

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