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Ugotavljanje fungicidnih lastnosti lesa impregniranega z glino : diplomski projekt
Levanič, Jaka (Author), Pohleven, Franc (Mentor) More about this mentor... This link opens in a new window, Humar, Miha (Reviewer)

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/du1_levanic_jaka.pdf This link opens in a new window

Abstract
Neodporne lesne vrste, ki v naših gozdovih prevladujejo in se uporabljajo v konstrukcijske namene, je potrebno kemično zaščititi in tako preprečiti morebitne poškodbe zaradi delovanja gliv ali insektov. V lesni panogi obstaja več vrst biocidov, ki so učinkoviti, vendar lahko les, zaščiten s temi sredstvi, škodljivo vpliva na človeka in okolje. Zato smo se v diplomski nalogi usmerili v okolju popolnoma prijazen način zaščite lesa z glino. Preučili smo delovanje gline, kot zaščitnega sredstva proti glivam, v skladu s standardom EN 113:1996. Vzorce smrekovine (Picea abies) smo vakuumsko impregnirali z različnimi koncentracijami vodne suspenzije gline in jih izpostavili delovanju dveh vrst gliv rjave trohnobe to je navadni tramovki (Gloeophyllum trabeum) ter beli hišni gobi (Poria vaillantii). Na podlagi izgube teže smo ovrednotili učinkovitost zaščite z glino. Uporabljene koncentracije suspenzij se v nobenem primeru niso izkazale kot učinkovito sredstvo, saj so bili odstotki izgube mase v vseh primerih zelo podobni kontrolnim, prav tako tudi statistična analiza ni pokazala bistvenih razlik. V primeru navadne tramovke smo zabeležili izgubo okoli 30 %, pri beli hišni gobi pa le okoli 7 %. Ker pa so bili vsi vzorci enako razkrojeni, smo izločili kakršenkoli vpliv gline na delovanje gliv.

Language:Slovenian
Keywords:les, zaščita lesa, impregnacija, glina, lesne glive
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2012
Publisher:[J. Levanič]
Number of pages:X, 42 f.
Place:Ljubljana
UDC:630*841.1
COBISS.SI-ID:2043785 Link is opened in a new window
Views:506
Downloads:154
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Secondary language

Language:English
Abstract:
The majority of wood species in Slovenia are prone to fungal or insect attack,therefore they need to be chemically protected in order to be used in construction applications, where we want to minimize damage caused by insects or fungi. In the wood industry there are many chemical preservatives that are efficient at protecting wood, although wood treated with these products may present a potential hazard, as some preservatives are hazardous to the enviorment. In this graduation thesis we focused on researching a material that may exhibit fungicidal properties and be completely harmless to the enviorment, clay. We studied the fungicidal properties of clay according to the standard EN 113:1996. Norway spruce samples were pressure treated with different concentrations of a clay suspension in water and exposed to two types of brown rot fungi, Gloeophyllum trabeum and Poria vaillantii. Based on sample weight loss we determined the effectivness of clay as a wood preservative. Our study shows that clay is a poor wood preservative as none of the samples showed any improvement with respect to the control sample. In the case of G. trabeum the weight loss was around 30 % with no significant deviation in any of the samples. P. vaillantii samples showed a lesser degree of degradation, only around 7 %, with only minimal deviation in any of the samples.

Keywords:wood, wood protection, pressure treatment, clay, wood fungi

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