Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood

Boron biocides belong to the most frequently used ingredients of commercial wood preservatives. They are very effective fungicides and insecticides, but they do not react with wood and thus leach from it in wet applications. This fact signifi cantly limits use of boron compounds in the field of wood...

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Autores principales:	Boštjan Lesar, Polonca Kralj, Miha Humar
Formato:	article
Lenguaje:	EN
Publicado:	University of Zagreb, Faculty of Forestry and Wood Technology 2010
Materias:	boric acid leaching wax emulsion Norway spruce wood preservation Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/37f2a65ceedb432c9f4d727ade284794
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spelling	oai:doaj.org-article:37f2a65ceedb432c9f4d727ade2847942021-12-02T02:14:20ZInfluence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood0012-67721847-1153https://doaj.org/article/37f2a65ceedb432c9f4d727ade2847942010-12-01T00:00:00Zhttp://hrcak.srce.hr/file/93645https://doaj.org/toc/0012-6772https://doaj.org/toc/1847-1153Boron biocides belong to the most frequently used ingredients of commercial wood preservatives. They are very effective fungicides and insecticides, but they do not react with wood and thus leach from it in wet applications. This fact signifi cantly limits use of boron compounds in the field of wood preservation. In order to reduce leaching of boric acid, the emulsion of polyethylene (WE1) and an emulsion of oxidized polyethylene (WE6) wax were combined with boric acid (cB = 0.1 % or 0.5 % of boron). Spruce wood specimens were vacuum impregnated and afterwards leached according to the prCEN/TS 15119-1, EN 1250-2 and EN 84 procedures. The results showed that the boron leaching is predominantly infl uenced by moisture content of wood during leaching, and furthermore by the concentration gradient (frequency of water replacement). The fact that the prCEN/TS 15119-1 leaching procedure is less severe than other two methods is also refl ected in the results. The results of the EN 84 and ENV 1250 test are comparable, while the results of the prCEN/TS 15119-1 testing are not in line with the other two methods. Considerable portions of boron are leached from wood in the first leaching cycles, already. WE6 wax emulsion (oxidized polyethylene wax emulsion) in combination with heat treatment reduces boron leaching to a certain extent. On the other hand, impregnation of wood with WE1 (polyethylene wax emulsion) does not reduce it and it even enhances it.Boštjan LesarPolonca KraljMiha HumarUniversity of Zagreb, Faculty of Forestry and Wood Technologyarticleboric acidleachingwax emulsionNorway sprucewood preservationForestrySD1-669.5ENDrvna Industrija, Vol 61, Iss 4, Pp 213-221 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	boric acid leaching wax emulsion Norway spruce wood preservation Forestry SD1-669.5
spellingShingle	boric acid leaching wax emulsion Norway spruce wood preservation Forestry SD1-669.5 Boštjan Lesar Polonca Kralj Miha Humar Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood
description	Boron biocides belong to the most frequently used ingredients of commercial wood preservatives. They are very effective fungicides and insecticides, but they do not react with wood and thus leach from it in wet applications. This fact signifi cantly limits use of boron compounds in the field of wood preservation. In order to reduce leaching of boric acid, the emulsion of polyethylene (WE1) and an emulsion of oxidized polyethylene (WE6) wax were combined with boric acid (cB = 0.1 % or 0.5 % of boron). Spruce wood specimens were vacuum impregnated and afterwards leached according to the prCEN/TS 15119-1, EN 1250-2 and EN 84 procedures. The results showed that the boron leaching is predominantly infl uenced by moisture content of wood during leaching, and furthermore by the concentration gradient (frequency of water replacement). The fact that the prCEN/TS 15119-1 leaching procedure is less severe than other two methods is also refl ected in the results. The results of the EN 84 and ENV 1250 test are comparable, while the results of the prCEN/TS 15119-1 testing are not in line with the other two methods. Considerable portions of boron are leached from wood in the first leaching cycles, already. WE6 wax emulsion (oxidized polyethylene wax emulsion) in combination with heat treatment reduces boron leaching to a certain extent. On the other hand, impregnation of wood with WE1 (polyethylene wax emulsion) does not reduce it and it even enhances it.
format	article
author	Boštjan Lesar Polonca Kralj Miha Humar
author_facet	Boštjan Lesar Polonca Kralj Miha Humar
author_sort	Boštjan Lesar
title	Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood
title_short	Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood
title_full	Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood
title_fullStr	Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood
title_full_unstemmed	Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood
title_sort	influence of polyethylene and oxidized polyethylene wax emulsions on leaching dynamics of boric acid from impregnated spruce wood
publisher	University of Zagreb, Faculty of Forestry and Wood Technology
publishDate	2010
url	https://doaj.org/article/37f2a65ceedb432c9f4d727ade284794
work_keys_str_mv	AT bostjanlesar influenceofpolyethyleneandoxidizedpolyethylenewaxemulsionsonleachingdynamicsofboricacidfromimpregnatedsprucewood AT poloncakralj influenceofpolyethyleneandoxidizedpolyethylenewaxemulsionsonleachingdynamicsofboricacidfromimpregnatedsprucewood AT mihahumar influenceofpolyethyleneandoxidizedpolyethylenewaxemulsionsonleachingdynamicsofboricacidfromimpregnatedsprucewood
_version_	1718402585368461312

Influence of Polyethylene and Oxidized Polyethylene Wax Emulsions on Leaching Dynamics of Boric Acid from Impregnated Spruce Wood

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