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Vpliv relativne zračne vlažnosti in anoksičnih razmer na vezavo baker-etanolaminskih pripravkov v smrekovino : diplomsko delo - visokošolski strokovni študij
Biškup, Jure (Author), Humar, Miha (Mentor) More about this mentor... This link opens in a new window, Pohleven, Franc (Reviewer)

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Abstract
Med najpomembnejša zaščitna sredstva za impregnacijo lesa v 3. in 4. razredu izpostavitve spadajo baker-etanolaminski pripravki. Fiksacija teh pripravkov je v primerjavi s klasičnimi hitrejša in je končana v 2 do 24 urah po impregnaciji. Po določenem času se vezava teh pripravkov zopet poslabša. Ugotavljali smo kako različni postopki kondicioniranja vplivajo na vezavo baker-etanolaminskih pripravkov v les. Smrekove vzorce smo impregnirali s 3 koncentracijami zaščitnega pripravka Silvanolin (CCu = 0,1 %, 0,25 % in 0,5 %). Po impregnaciji smo vzorce kondicionirali 10 dni pri različnih pogojih (anoksični pogoji, suha klima, vlažna klima ...), zatem pa smo jih izprali v skladu s standardom SIST EN 1250. Iz vzorcev, impregniranih z zaščitnim pripravkom višje koncentracije, se je v povprečju izpral manjši delež Cu učinkovin kot pri vzorcih impregniranih z nižjo koncentracijo. Najvišji delež (2,8 %) izpranega Cu iz vzorcev smo opazili pri sušenju na temperaturi 50 °C in srednji koncentraciji (CCu = 0,25 %). Najmanj Cu (1,0 %) pa se je izpralo iz pripravkov višje koncentracije (CCu = 0,5 %) pri temperaturi 25 °C. V večini primerov je bila vezava baker-etanolaminskih pripravkov pri višji relativni zračni vlažnosti boljša kot pri vzorcih, sušenih v suhi atmosferi. Anoksične razmere so pozitivno vplivale na vezavo Cu v les.

Language:Slovenian
Keywords:izpiranje, bakrovi pripravki, etanolamin, vezava
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2011
Publisher:[J. Biškup]
Number of pages:X, 47 f.
Place:Ljubljana
UDC:630*841
COBISS.SI-ID:1978761 This link opens in a new window
Views:821
Downloads:205
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Secondary language

Language:English
Title:Influence of relative air humidity and anoxic conditions on fixation of copper-ethanolamine wood preservatives : graduation thesis - higher professional studies
Abstract:
Copper-ethanolamine solutions are the most important wood preservatives in use class 3 and 4 applications. Fixation of these preservatives is finished within 2 to 24 hours. However, the efficacy of fixation decreases within time. Therefore, influence of the various conditioning methods (anoxic conditions, dry climate, wet climate, etc.) on copper leaching was elucidated. Spruce wood specimens were impregnated with Silvanolin aqueous solution of 3 different concentrations (cCu = 0.1 %, 0.25 % and 0.5 %). After impregnation, specimens were conditioned for 10 days in various regimes and afterwards leached according EN 1250 protocol. The results clearly showed that lower Cu emissions were determined from the specimens impregnated with aqueous solutions of higher concentrations. The highest Cu leaching (2.8 %) was determined at specimens impregnated with Cu solution of middle concentration (cCu = 0.25 %) and dried at 50 °C. On the contrary, at specimens impregnated with solution of the highest concentration and dried at 25 °C the lowest Cu emissions were determined (1 %). In general, Cu fixation at specimens conditioned at higher relative air humidity was better compared to the specimens dried in dry climate. Additionally, drying in anoxic conditions have positive effect on Cu fixation.

Keywords:leaching, ethanolamine, copper based preservatives, fixation

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