Primerjava treh standardnih postopkov izpiranja aktivnih učinkovin iz impregniranega lesa

diplomsko delo - visokošolski strokovni študij

Boris Drnovšek (Author), Franc Pohleven (Reviewer), Miha Humar (Mentor)

Abstract

Za lesne izdelke, ki so impregnirani z zaščitnim sredstvom in se uporabljajo na prostem, je zelo pomembno, da se aktivne učinkovine iz lesa ne izpirajo. Zato je fiksacija biocidov v les zelo pomemben del razvoja zaščitnih pripravkov. Za preverjanje učinkovitosti vezave se uporablja več standardnih in nestandardnih metod. Za testiranja smo uporabili 3 standardne metode: SIST ENV 1250-2, SIST EN 84 in priporočilo OECD. Smrekove vzorce smo impregnirali s 4 pripravki: vodno raztopino borove kisline, kombinacijo borove kisline in vodne emulzije montana voska, vodno raztopino bakrovega (II) sulfata in baker-etanolaminskim komercialnim pripravkom Silvanolin. Ne glede na uporabljeni postopek izpiranja, so se v vseh primerih najbolj izprale učinkovine iz vzorcev, prepojenih z borovo kislino; najmanj pa učinkovine iz vzorcev, impregniranih z baker-etanolaminskim pripravkom Silvanolin. Najbolj blagi postopek izpiranja je metoda OECD; največ biocidov pa se je izpralo s standardno metodo SIST EN 84.

Keywords

les;izpiranje;vezava;borova kislina;bakrovi pripravki;

Data

Language:	Slovenian
Year of publishing:	2010
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[B. Drnovšek]
UDC:	630*841
COBISS:	1819017
Views:	910
Downloads:	204
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Comparison of active ingredients leaching from impregnated wood determined according to three standard leaching procedures
Secondary abstract:	When impregnated wood is used for outdoor applications, it is essential that the active ingredients do not leach from it. Therefore, the evaluation of fixation of active ingredients is an important part of the development of wood preservatives. For this purpose, numerous standard and non-standard methods are utilized. 3 standard methods: ENV 1250-2, EN 84 and OECD Recommendation were used, and applied on spruce wood impregnated with 4 products: water solution of boric acid, a combination of boric acid and montan wax water emulsion, an aqueous solution of copper (II) sulphate and copper-ethanolamine (commercial solution (Silvanolin). Apart from the leaching method utilized, leaching of boron from boric acid treated wood was the most prominent, and on the other hand copper at Silvanolin treated wood exhibited the best performance. The least aggressive leaching method is OECD method, however, the most aggressive is EN 84 one.
Secondary keywords:	wood;protection;leaching;boric acid;copper based preservatives;fixation;
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Biotehniška fakulteta, Odd. za lesarstvo
Pages:	IX, 49 f.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID:	21891