20.500.12556/RUL-122426 Sinteza in karakterizacija poliuretanskih premazov iz utekočinjene drevesne skorje magistrsko delo Synthesis and characterization of polyurethane coatings from liquefied bark M. Sc. thesis V primarni predelavi lesa nastajajo večje količine odstranjene drevesne skorje, ki predstavlja pomemben neizkoriščen ostanek. Zato bi jo bilo v prihodnosti smotrno čim bolje izkoristiti, ne samo v energetske namene temveč predvsem v izdelkih z visoko dodano vrednostjo. Utekočinili smo skorjo smreke (Picea abies Karst.) in jo uporabili za pripravo poliuretanskih premazov za les. Skorjo smo utekočinili v glicerolu, zmesi polietilen glikola in glicerola ter v etilen glikolu. Pri nanosu se je najbolje obnesel premaz iz skorje, utekočinjene v zmesi polietilen glikola in glicerola. Poleg premaza iz skorje, utekočinjene v zmesi polietilen glikola in glicerola, smo za primerjavo okarakterizirali tudi komercialni poliuretanski premaz. Vse teste smo opravili po standardnih postopkih. Rezultati so pokazali nekoliko boljše lastnosti premaza iz utekočinjene drevesne skorje od lastnosti komercialnega poliuretanskega premaza, vendar na račun visokega deleža izocianata v premazu. Primary wood processing results in formation of large amounts of removed bark, representing an important unused residue. In future, it would be more reasonable to use bark not only for energetic purposes, but above all in high added value products. Norway spruce (Picea abies Karst.) bark was liquefied and applied for preparation of polyurethane wood coatings. The bark was liquefied in glycerol, the mixture of polyethylene glycol and glycerol, and in ethylene glycol. The best results were obtained using the bark liquefied in the mixture of polyethylene glycol and glycerol. Just to compare, in addition to this coating, commercial polyurethane wood coating was also characterised. All characterisation tests were performed according to standard procedures. Compared to the properties of the commercial polyurethane finish, the results exhibited somewhat better properties of the liquefied bark based coating, due to higher content of isocyanate. drevesna skorja utekočinjenje premazi za les lastnosti premazov bark wood liquefaction wood coatings characteristics of coatings true false false [N. Jan] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-12-10 12:38:14 2020-12-10 12:38:15 2022-09-02 04:03:16 0000-00-00 00:00:00 2013 0 Ljubljana 2013 Ljubljana VIII, 50 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829.1 2133897 MAG_Jan_Nejc_2013.pdf MAG_Jan_Nejc_2013.pdf 1 380418D2B404BA10239B767AEB6A8087 1510de08de01d40bd82ebbf73f86b4613d7e54da5e6d3efbb71b38ff6f8e9f95 1a7b7e72-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=137611 Biotehniška fakulteta 0 0 0