Časovna odvisnost emisije formaldehida iz lesnih ploščnih kompozitov : magistrska naloga

Sašek, Dejan (author), Medved, Sergej (mentor), Poljanšek, Ida (reviewer)

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

• Language: Slovenian
• Keywords: časovna odvisnost, emisija, formaldehid, lesni ploščni komoziti
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: D. Sašek
• Year: 2015
• Number of pages: IX, 45 str.
• PID: 20.500.12556/RUL-158689
• UDC: 630*862
• COBISS.SI-ID: 2476937
• Publication date in RUL: 19.06.2024

Secondary language

• Language: English
• Title: Time related emission od formaldehyde from wood based composites : M. Sc. thesis

Abstract

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

• Keywords: time related, emission, formaldehyde, wood based composites