Compression Strength of Fir and Beech Wood Modified by Citric Acid

Previous articles have shown that modification of wood by citric acid (CA) improves dimensional stability and resistance of wood against fungi attack. However, chemical modification of wood also modifies its mechanical properties in some way. The compression strength of wood is one of its representa...

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Autores principales:	Bogoslav Šefc, Jelena Trajković, Tomislav Sinković, Marin Hasan, Iva Ištok
Formato:	article
Lenguaje:	EN
Publicado:	University of Zagreb, Faculty of Forestry and Wood Technology 2012
Materias:	Fir wood (Abies alba Mill.) beech wood (Fagus sylvatica L.) chemical modification citric acid (CA) compression strength Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/aa6dc54145594e08a9eacbf886c57e14
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spelling	oai:doaj.org-article:aa6dc54145594e08a9eacbf886c57e142021-12-02T01:51:20ZCompression Strength of Fir and Beech Wood Modified by Citric Acid0012-67721847-1153https://doaj.org/article/aa6dc54145594e08a9eacbf886c57e142012-03-01T00:00:00Zhttp://hrcak.srce.hr/file/116753https://doaj.org/toc/0012-6772https://doaj.org/toc/1847-1153Previous articles have shown that modification of wood by citric acid (CA) improves dimensional stability and resistance of wood against fungi attack. However, chemical modification of wood also modifies its mechanical properties in some way. The compression strength of wood is one of its representative mechanical properties. Modified wood with lower values of compression strength has limited purpose. The intention of this work is to show the effect of wood modification by citric acid on the compression strength of wood. Fir wood (Abies alba Mill.) and beech wood (Fagus sylvatica L.) were impregnated by citric acid with sodium-dihydrogen-hypophosphite (NaH2PO2) as a catalyst. Part of the impregnated samples together with control samples were cured at the temperature of 140 °C for 10 hours and the remaining samples were cured in microwaves for 35 minutes. The average compression strength parallel to the grain of wood modifi ed by CA, using different regimes of curing, was compared to the strength of unmodifi ed wood. The average compression strength parallel to the grain of wood was retained after modification. In the case of fir wood, the average compression strength was even improved after modification. The results indicate that wood modified by citric acid may be considered for the purposes where compression strength properties are equally important as improved durability and dimensional stability of wood.Bogoslav ŠefcJelena TrajkovićTomislav SinkovićMarin HasanIva IštokUniversity of Zagreb, Faculty of Forestry and Wood TechnologyarticleFir wood (Abies alba Mill.)beech wood (Fagus sylvatica L.)chemical modificationcitric acid (CA)compression strengthForestrySD1-669.5ENDrvna Industrija, Vol 63, Iss 1, Pp 45-50 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Fir wood (Abies alba Mill.) beech wood (Fagus sylvatica L.) chemical modification citric acid (CA) compression strength Forestry SD1-669.5
spellingShingle	Fir wood (Abies alba Mill.) beech wood (Fagus sylvatica L.) chemical modification citric acid (CA) compression strength Forestry SD1-669.5 Bogoslav Šefc Jelena Trajković Tomislav Sinković Marin Hasan Iva Ištok Compression Strength of Fir and Beech Wood Modified by Citric Acid
description	Previous articles have shown that modification of wood by citric acid (CA) improves dimensional stability and resistance of wood against fungi attack. However, chemical modification of wood also modifies its mechanical properties in some way. The compression strength of wood is one of its representative mechanical properties. Modified wood with lower values of compression strength has limited purpose. The intention of this work is to show the effect of wood modification by citric acid on the compression strength of wood. Fir wood (Abies alba Mill.) and beech wood (Fagus sylvatica L.) were impregnated by citric acid with sodium-dihydrogen-hypophosphite (NaH2PO2) as a catalyst. Part of the impregnated samples together with control samples were cured at the temperature of 140 °C for 10 hours and the remaining samples were cured in microwaves for 35 minutes. The average compression strength parallel to the grain of wood modifi ed by CA, using different regimes of curing, was compared to the strength of unmodifi ed wood. The average compression strength parallel to the grain of wood was retained after modification. In the case of fir wood, the average compression strength was even improved after modification. The results indicate that wood modified by citric acid may be considered for the purposes where compression strength properties are equally important as improved durability and dimensional stability of wood.
format	article
author	Bogoslav Šefc Jelena Trajković Tomislav Sinković Marin Hasan Iva Ištok
author_facet	Bogoslav Šefc Jelena Trajković Tomislav Sinković Marin Hasan Iva Ištok
author_sort	Bogoslav Šefc
title	Compression Strength of Fir and Beech Wood Modified by Citric Acid
title_short	Compression Strength of Fir and Beech Wood Modified by Citric Acid
title_full	Compression Strength of Fir and Beech Wood Modified by Citric Acid
title_fullStr	Compression Strength of Fir and Beech Wood Modified by Citric Acid
title_full_unstemmed	Compression Strength of Fir and Beech Wood Modified by Citric Acid
title_sort	compression strength of fir and beech wood modified by citric acid
publisher	University of Zagreb, Faculty of Forestry and Wood Technology
publishDate	2012
url	https://doaj.org/article/aa6dc54145594e08a9eacbf886c57e14
work_keys_str_mv	AT bogoslavsefc compressionstrengthoffirandbeechwoodmodifiedbycitricacid AT jelenatrajkovic compressionstrengthoffirandbeechwoodmodifiedbycitricacid AT tomislavsinkovic compressionstrengthoffirandbeechwoodmodifiedbycitricacid AT marinhasan compressionstrengthoffirandbeechwoodmodifiedbycitricacid AT ivaistok compressionstrengthoffirandbeechwoodmodifiedbycitricacid
_version_	1718402860069158912

Compression Strength of Fir and Beech Wood Modified by Citric Acid

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