20.500.12556/RUL-158864 Priprava in karakterizacija premaza za les z luminiscentnim efektom diplomsko delo - univerzitetni študij Preparation and characterisation of a wood coating with a luminiscent effect graduation thesis - university studies Ugotavljali smo, ali je v premaze za les možno vmešati pigmente z luminiscentnim efektom. Uporabljali smo luminiscentne delce velikosti 10 %m in 4 %m. Pigment nam je uspelo vmešati v premazne sisteme, tako da smo pripravili paleto vzorcev z različnimi koncentracijami pigmenta v premazu, in z različnimi debelinami filmov. Med mešanjem so se zmesi precej segrele. Pripravili smo premaze s 5 %, 10 %, 15 %, 20 %, 30 %, 40 % in 50 % vmešanega pigmenta. Nanose smo izvedli na bukov furnir na iverni plošči ter na masivni hrastov les. Nanašali smo filme nazivnih debelin 40 %m, 120 %m in 240 %m. Utrjevanje filmov je potekalo bodisi na zraku ali z UV svetlobo. Ugotovili smo, da dodani pigment ne vpliva negativno na utrjevanje filma. Vzorce smo nato analizirali v temnici, kjer je luminiscentni efekt prišel najbolj do izraza. S slik, posnetih z digitalnim fotoaparatom ter s pomočjo nekaj računalniških programov smo za vsak vzorec izračunali svetlost L. Ugotovili smo, da večja koncentracija pigmenta v premazu poveča intenziteto in trajanje luminiscenčnega efekta. Prav tako na luminiscenco filmov vplivajo tudi debelina filma, prisotnost omakal, vrsta podlage, vmesno brušenje vmesnih plasti premaznega sistema, število nanosov ter vir svetlobe, ki mu izpostavimo luminiscentni film. We analysed the possibilities of mixing the pigments with a luminescent effect into different wood coatings. We used luminescent particles in sizes of 10 %m and 4 %m. For stirring the pigment into coating systems, we prepared samples with different concentrations of the pigment in the coatings and with different film thicknesses. During the stirring, the mixtures heated significantly. We prepared coatings with 5 %, 10 %, 15 %, 20 %, 30 %, 40 % and 50 % of the pigment. As a substrate we used beech veneered chipboard and oak solid wood. We applied films with the nominal thicknesses of 40 %m, 120 %m and 240 %m. Curing of films was performed in air or with UV light. We found out that the added pigment does not have a negative effect on curing of a film. We analysed the samples in a dark room, where a luminescent effect was the most prominent. From the photos taken with a digital camera and with the help of computer programmes we estimated the brightness (L) of each sample. We ascertained that the intensity and duration of the luminescent effect increase with higher concentration of the pigment in the coating. Luminescence of a film is also influenced by the following factors: film thickness, the presence of a surfactant, substrate type, intermediate sanding of intermediate coating layers, number of coating layers, as well as the source of light to which the luminescent film is exposed to. premazi za les luminiscentni pigmenti luminiscentni filmi wood coatings luminescent pigments luminescent films true false false J. Lipej Slovenski jezik Angleški jezik Diplomsko delo 2024-06-21 11:49:28 2024-06-21 11:49:31 2024-07-05 03:41:43 0000-00-00 00:00:00 2016 0 Ljubljana 2016 Ljubljana IX, 59 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829.1 2643081 UNI_Lipej_Jani_2016.pdf UNI_Lipej_Jani_2016.pdf 1 79AC2FD590A43852C6F8B9BE7FD3A793 ef0c0a996cf41ff5b40839eb669fed48cdc91b554b512df08ab292cfe2ae517d 8fb9bba2-2fb3-11ef-a25b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186593 Biotehniška fakulteta 0 0 0