Naslov
Properties of particleboards produced by catalytic reaction of liquified wood on urea-formaldehyde resins

Autori
Antonović, Alan ; Jambreković, Vladimir ; Kljak, Jaroslav ; Ištvanić, Josip ; Španić, Nikola ; Jug, Davor

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Wood is good - Transfer of knowledge in practice as a way out of the crisis / Despot, Radovan - Zagreb : Šumarski fakultet Sveučilišta u Zagrebu, 2010, 1-11

ISBN
978-953-292-018-5

Skup
Wood is good - Transfer of knowledge in practice as a way out of the crisis

Mjesto i datum
Zagreb, Hrvatska, 15.10.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
liquefied wood; urea-formaldehyde resin; catalysts; particleboards

Sažetak
Wood composite materials and fragmented wood-based panels, respectively, are materials of the future. With their wide spectra of potential applications these materials occupy almost all fields of use. The quality of wood composite materials does not exclusively depend on wood species and their properties applied in production, but with application of other non-wood necessary synthetic chemical components, such as various resins, catalysts and paraffin emulsion, are designed in accordance with the application requirements. Regarding to this issue, the aim of this study was to use liquefied wood (LW) as a catalyst (hardener) in the polymerization process of urea-formaldehyde (UF) resins at elevated temperatures, and the influence of its reaction on particleboards physical-mechanical properties and formaldehyde emission. The studies have been carried out on experimental three-layer particleboards made with catalysts for UF resins polymerization, which is commonly used for the commercial production, namely ammonium chloride, NH4Cl, and ammonium sulfate, (NH4)2SO4. Furthermore, under the same conditions, particleboards with liquefied wood as a catalyst were produced, and based on the testing results the comparison with the above mentioned catalysts had been made. The liquefied wood was not especially prepared before use, but extremely acidic nature of its components, that enabled liquefaction, was used. The research results showed that liquefied wood as a catalyst has a positive effect on the polymer structure and adhesion-cohesion properties of UF adhesives, and also on the particleboards physical-mechanical properties and formaldehyde emission, so it successfully replaced the commercial types of catalysts.

Izvorni jezik
Engleski

Znanstvena područja
Drvna tehnologija

POVEZANOST RADA