Ugotavljanje insekticidnih lastnosti lesa modificiranega s sredstvom Meldur-DMES : diplomsko delo - visokošolski strokovni študij

Uršič, Marko (author), Pohleven, Franc (mentor), Humar, Miha (reviewer)

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.

• Language: Slovenian
• Keywords: les, insekticidne lastnosti, modifikacija, Meldur-DMES
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [M. Uršič]
• Year: 2009
• Number of pages: IX, 51 f., [8] f. pril.
• PID: 20.500.12556/RUL-446
• UDC: 630*841
• COBISS.SI-ID: 1777801
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English

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.

• Keywords: wood, insecticidal properties, modification, Meldur-DMES