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Vpliv deleža skorje v iverni plošči na vsebnost prostega formaldehida : diplomsko delo : univerzitetni študij = Influence od wood bark particle in particleboard on emission of free formaldehyde : graduation thesis : university studies
Gajšek, Urška, 23.05.1981-
Formaldehid je prisoten povsod v našem okolju. Zdravju je škodljiv, zato poskušamo znižati njegovo raven na minimum. Prosti formaldehid je v iverni plošči prisoten zaradi polikondenzacijskih lepil ...(UF, FF, MF, MUF, itd.). Sčasoma začne izhajati iz plošč, le-te pa največkrat uporabljamo za notranje prostore. Raziskovali smo vpliv deleža skorje v iverni plošči na izhajanje prostega formaldehida. Iz lesa bukve (Fagus sylvatica L.) smo naredili 10 ivernih plošč z različnimi deleži (20, 35, 50, 65 in 80 %) skorje smreke (Picea abies L.). Iz vsake plošče smo izrezali po 10 vzorcev (25x25x16 mm), ter jim izmerili vsebnost formaldehida po standardizirani steklenični metodi SIST EN 717-3. Ugotovili smo, da se z naraščajočim deležem skorje količina emitiranega formaldehida močno zmanjša, vendar le do neke meje. Vzrok zato so polifenolne snovi kot so ekstraktivi, lignin in tanini, ki predstavljajo največji del skorje.
Type of material - undergraduate thesis
; adult, serious
Publication and manufacture - Ljubljana : [U. Gajšek], 2008
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