20.500.12556/RUL-140573 Uporaba utekočinjenega lesa za pigmentiranje oljnih premazov Use of liquefied wood for pigmentation of oil coatings Olja se uporabljajo za obdelavo površin lesa v notranji in zunanji uporabi. Če jim dodamo pigmente, lahko z njimi dosegamo dodatne vizualne učinke, kot so rustikalen izgled, poudarjanje lesnih por, obenem pa povečamo zaščitno sposobnost premaza proti fotodegradaciji lesne podlage. V naši raziskavi smo namesto klasičnih pigmentov uporabili naraven in obnovljiv vir, utekočinjen les (UL), ki smo ga v dve olji vmešali v dveh razmerjih. Tako pripravljene mešanice smo nanesli na vzorce bukovega in jesenovega lesa. Po nanosu smo najprej spremljali hitrost sušenja, po osušitvi pa smo določili še lastnosti, kot so barva, sijaj in odpornost površin proti hladnim tekočinam ter suhi toploti. Površine smo tudi izpostavili pogojem umetnega staranja pod ultra-vijolično (UV) svetlobo in s tem preverili kakšno vlogo pri tem igra dodatek UL. Naša raziskava je potrdila, da je UL kompatibilen s tungovim in Bioimpregnol WM oljem ter se posledično lahko uspešno uporablja za njuno pigmentiranje. Potrdili smo tudi, da dodajanje UL v tungovo olje ne vpliva na odpornost tako premazanih površin proti hladnim tekočinam in niti ne na odpornost površin obeh olj proti suhi toploti. Žal pa dodajanje UL v olja upočasnjuje hitrost sušenja. Dodatno smo tudi ugotovili, da z UL pigmentirani premazi niso najbolj foto stabilni. Oils are used to treat wood surfaces for interior and exterior use. The addition of pigments can provide additional visual effects, such as a rustic appearance that highlights the wood pores, while increasing the protective effect of the coating against photochemical decomposition of the wood substrate. In our research, instead of classical pigments, we used a natural and renewable raw material, liquefied wood (LW), which we mixed in two proportions with two oils. The mixtures prepared in this way were applied to samples of beech and ash wood. After application, we first monitored the drying rate and also determined properties such as colour, gloss, and surface resistance to cold liquids and dry heat after drying. We also subjected the surfaces to artificial aging under ultraviolet (UV) light to verify the role of the LW additive. Our research confirmed that LW is compatible with tung oil and Bioimpregnol WM and can therefore be used successfully for their pigmentation. We also confirmed that the addition of LW to tung oil does not affect the resistance of surfaces coated in this way to cold liquids, nor the resistance of the surfaces of both oils to dry heat. Unfortunately, the addition of LW to oils slows the drying rate. In addition, we have found that coatings pigmented with LW are not the most light stable. utekočinjen les pigmentacija oljni premazi liquefied wood pigmentation oil coatings true false false [A. Šporar] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-16 07:16:44 2022-09-16 07:16:49 2022-10-03 10:54:44 0000-00-00 00:00:00 2022 0 Ljubljana 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829.18 210921 123879683 26506.pdf 26506.pdf 1 EE74432F292C3198FB9766C821C24025 a5144e8c9ab0ee8350e4569add33ccd804c70ef85a05ec126ce688957b465e1f b5eeb676-357e-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=161327 Biotehniška fakulteta 0 0 0