20.500.12556/RUL-158689 Časovna odvisnost emisije formaldehida iz lesnih ploščnih kompozitov magistrska naloga Time related emission od formaldehyde from wood based composites M. Sc. thesis Emisija prostega formaldehida iz lesnih ploščnih kompozitov se s časom spreminja. V magistrski nalogi smo poskušali določiti hitrost spreminjanja emisije prostega formaldehida v odvisnosti od časa klimatizacije plošč. Uporabili smo različne vzorce OSB-plošče, vlaknene plošče, iverne plošče in furnirne plošče. Preizkušance smo izpostavili normalnim klimatskim pogojem. Emisijo smo določili po plinski metodi (SIST EN 717-2). Opravili smo 6 meritev v intervalu 14 dni. Poleg emisije smo spremljali tudi ravnovesno vlažnost kompozitov in velikost spektra emisije prostega formaldehida pri valovni dolžini 410 +- 25 Hz. Iz velikosti spektra smo izračunali površino. Ugotovili smo, da se površina spektra veča z emisijo, dosegli smo tudi zelo dobre korelacije med površino in emisijo formaldehida. Z večanjem ravnovesne vlažnosti in posledično večje količine vode v vzorcu se je s časovnim zamikom povečala tudi emisija prostega formaldehida Formaldehyde emission in wood based composites is changing with time. In our research we examined the change in formaldehyde emission related to the time of storage. We used different wood based composites such as OSB, fiberboard (MDF), particleboard and plywoods. All samples were exposed to normal room conditions. Emission was determined by gas method, according to SIST EN 717-2. We performed 6 measurements at intervals of 14 days. Total time of storage and monitoring was 84 days. Beside determination of emission we were determining equilibrium moisture content and the surface under spectrum arround 412 nm. From the size of spectrum we calculated the surface and compared it with the nominal value of emission. We have found that surface of spectrum increases with higher emission of free formaldehyde. We have also determined the correlation between surface and formaldehyde emission. With increasing moisture the emission of free formaldehyde was increasing časovna odvisnost emisija formaldehid lesni ploščni komoziti time related emission formaldehyde wood based composites true false false D. Sašek Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-06-19 11:41:17 2024-06-19 11:41:20 2024-07-03 03:38:42 0000-00-00 00:00:00 2015 0 Ljubljana 2015 Ljubljana IX, 45 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*862 2476937 MAG_Sasek_Dejan_2015.pdf MAG_Sasek_Dejan_2015.pdf 1 5C7A80DD4C8464A944D4C44467655F45 14508fc6c254a1220bf34e9a038e6b90836d1052e8bec74a0cfc7148f337aedd 157db141-2e20-11ef-aa1b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186401 Biotehniška fakulteta 0 0 0