Ugotavljanje insekticidnih lastnosti lesa modificiranega s sredstvom Meldur-DMES

diplomsko delo - visokošolski strokovni študij

Marko Uršič (Author), Miha Humar (Reviewer), Franc Pohleven (Mentor)

Abstract

Pri uvajanju novih zaščitnih sredstev je treba izvesti vrsto raziskav in preizkušanj. Sredstvo Meldur-DMES smo testirali, da bi ugotovili njegovo učinkovitost proti termitom. Vzorce lesa bora in smreke smo modificirali s koncentracijama reagenta (5 in 10 % z in brez katalizatorja), nato pa smo jih še termično modificirali pri temperaturi 170 °C. S tem se je lesu izboljšala odpornost na biotične dejavnike in povečala dimenzijska stabilnost. Pred izpostavitvijo rumenovratemu termitu - Kalotermes flavicollis, smo vzorce sprali/umetno starali po standardu SIST EN 84. Ugotovili smo, da je sredstvo učinkovito, vendar le, če so vzorci kemično modificirani z višjo koncentracijo Meldur-DMES-a. Odpornost na termite se še izboljša s termično modifikacijo pri 170 °C. Vzorci modificirani z Meldur-DMESom s katalizatorjem (borova kislina) in temperaturo 170 °C so najbolj odporni na termite, saj je smrtnost največja, poškodbe vzorcev pa minimalne.

Keywords

les;insekticidne lastnosti;modifikacija;Meldur-DMES;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[M. Uršič]
UDC:	630*841
COBISS:	1777801
Views:	868
Downloads:	209
Average score:	0 (0 votes)
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Other data

Secondary language:	English
Secondary title:	Determination of insekticidal properties of wood modified with meldur-DMES reagent
Secondary abstract:	At introduction of new protective means lots of researches and testings have to be done. The efficiency of Meldur-DMES, a protective means against termites, was tested. Samples of boron and spruce were modified with 2 concentrations of reagent (5 and 10 % with and without a catalyzer), and afterwards thermally modified at 170 °C. These 2 procedures improved the resistance of wood on biotic stability and increased its dimension stability. Before exposing samples to yellowneck termite (Kalotermes flavicollis) they were washed/artificially aged according to standard SIST EN 84. It was found out that this means is effective only when the samples are modified with higher concentration of Meldur-DMES. Thermal modification at 170 °C improves the resistance on thermites even more.Samples, modified with Meldur-DMES with catalyzer (boric acid) at 170 °C show the best thermite resistance, because at these conditions the mortality rate is the biggest and injury of samples minimal.
Secondary keywords:	wood;insecticidal properties;modification;Meldur-DMES;
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Biotehniška fakulteta, Odd. za lesarstvo
Pages:	IX, 51 f., [8] f. pril.
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:	21741