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Odpornost lesa modificiranega s sredstvom Meldur-DMES proti glivam modrivkam : diplomsko delo - visokošolski strokovni študij
ID Rot, Janez (Author), ID Pohleven, Franc (Mentor) More about this mentor... This link opens in a new window, ID Humar, Miha (Reviewer)

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MD5: 0E809AC69F961A6450D785DA4E2EDEA4
PID: 20.500.12556/rul/9de16f62-4b8e-40eb-9d9e-240a219600c5

Abstract
Izvedli smo modifikacijo lesa s sredstvom Meldur-DMES v kombinaciji s termično modifikacijo in preučili odpornost modificiranega lesa proti glivam modrivkam. Vzorce smo pripravili iz beljave bora (Pinus sylvestris) in beljave smreke (Picea abies) po standardu SIST EN 152. Modificirali smo jih v vakuumski komori pri različnih koncentracijah (5 % in 10 %) Meldurja, brez in s katalizatorjem. Modificirane vzorce smo pred izpostavitvijo glivam izprali po standardu SIST EN 84. Test smo izvedli z glivama, in sicer Aureobasidium pullulans in Sclerophoma pithyophila po standardu SIST EN 152. Po 6-tedenski izpostavitvi smo vzorcem vizualno določili pomodrelost površine. Ugotovili smo, da je pri višji koncentraciji modifikacijskega sredstva (10 % raztopina z dodatkom katalizatorja) in pri višji temperaturi (170 °C) dosežena višja stopnja odpornosti lesa proti glivam modrivkam. Izjema so vzorci beljave bora, modificirani pri temperaturi 170 °C, ki so brez kemične modifikacije dosegli popolno odpornost pred obarvanjem z glivami modrivkami.

Language:Slovenian
Keywords:les, modifikacija, Meldur-DMES, WPC, glive modrivke
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Place of publishing:Ljubljana
Publisher:[J. Rot]
Year:2009
Number of pages:XIII, 84 f.
PID:20.500.12556/RUL-417 This link opens in a new window
UDC:630*844.1
COBISS.SI-ID:1760649 This link opens in a new window
Publication date in RUL:11.07.2014
Views:1830
Downloads:333
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Secondary language

Language:English
Title:Resistance of Meldur-DMES modified wood against blue stain fungi : graduation thesis - higher professional studies
Abstract:
Modification of wood was carried out with Meldur-DMES in a combination with a thermal modification, so as the resistance of modified wood to blue fungi was analysed. The samples were prepared from the sapwood of a pine tree (Pinus sylvestris) and from the sapwood of a spruce (Picea abies) according to the SIST EN 152 standard. They were modified in a vacuum-chamber at different Meldur concentrations (5 % and 10 % solution) with and without a catalyst. The modified samples were washed out according to the SIST EN 84 standard before their exposal to fungi. The test was carried out according to the SIST EN 152 standard with 2 fungi, Aureobasidium pullulans and Sclerophoma pithyophila. After being exposed for 6 weeks, the portions of the surfaces turned blue were defined. It was found out that the higher level of resistance of wood to the blue fungi was achieved at a higher concentration of Meldur, 10 % solution with the addition of a catalyst and at higher temperature (170 °C). The exceptions are the samples of a spruce tree, modified at temperature of 170 °C, which achieved a complete resistance to the colouring with the blue fungi.

Keywords:wood, modification, Meldur-DMES, WPC, blue stain fungi

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