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Vpliv alkilamonijevega klorida na vezavo in učinkovitost bakrovih pripravkov : diplomsko delo (visokošolski strokovni študij)
Gorše, Mihael (Author), Pohleven, Franc (Mentor) More about this mentor... This link opens in a new window, Humar, Miha (Co-mentor), Petrič, Marko (Reviewer)

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/vs_gorse_mihael.pdf New window

Abstract
Za zaščito lesa pogosto uporabljamo zaščitne pripravke na osnovi bakrovih spojin. Bakrovi pripravki so zelo učinkoviti fungicidi. Vendar se Cu iz lesa izpira. V zadnjem času se pojavljajo tolerantni sevi gliv, na katere Cu ne deluje več fungicidno. Zato smo skušali ugotoviti, kako na izpiranje Cu in na fungicidne lastnosti vplivajo kvartarne amonijeve spojine. S pripravki na osnovi bakra, etanolamina, kvartarnih amonijevih spojin, oktanojske kisline in biocida topbor, smo vakuumsko impregnirali vzorce iz smrekovega lesa. Po kondicioniranju in izpiranju smo v izpirku določili delež bakra z atomsko absorpcijsko spektroskopijo. Ugotovili smo, da se je ob prisotnosti amina močno zmanjšalo izpiranje Cu. Fungicidne lastnosti impregniranih vzorcev smo ugotavljali z mini blok metodo. Izprane in neizprane vzorce smo izpostavili delovanju gliv navadne tramovke (Gloeophyllum trabeum), bele hišne gobe (Antrodia vaillantii) in pisane ploskocevke (Trametes versicolor). Ugotovili smo, da izpiranje vzorcev ne poslabša fungicidnih lastnosti zaščitnih pripravkov.

Language:Slovenian
Keywords:zaščita lesa, bakrovi zaščitni pripravki, izpiranje, fungicidne lastnosti
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2005
Publisher:[M. Gorše]
Number of pages:X, 57 f.
Place:Ljubljana
UDC:630*841.1
COBISS.SI-ID:1296777 Link is opened in a new window
Views:639
Downloads:131
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Secondary language

Language:English
Abstract:
Protective preparations on copper based compounds are often use for protection of wood. Copper based preparations are very efficient fungicides, however, Cu from wood leaches out. Recently, tolerant strains of fungi have appeared, against which copper based preservatives are not efficient any more. That is why we tried to find out the influence of quaternary ammonium compounds on leaching of copper based fungicides. Samples from Norway spruce wood were vacuum impregnated with preparations based on copper, ethanolamine, quaternary ammonium compound, octanoic acid and biocide topbor. After drying and leaching we determined concentration of copper in the leachate by atomic absorption spectroscopy. It was found out, that leaching of copper was strongly reduced by the presence of amines. Fungicidal properties of the impregnated samples were determined by the mini block test method. The leached and non-leached samples were exposed to Gloeophyllum trabeum, Antrodia vaillantii and Trametes versicolor. It was found out that leaching did not decrease resistance against wood decay fungi.

Keywords:wood preservation, copper based preservatives, leaching, fungicidal properties

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