Abstract
Urea-formaldehyde (UF) resins are the most used resins in manufacturing particleboards. However, UF resins are susceptible to hydrolytic degradation, which causes formaldehyde emission and limits their use as wood panel adhesives for interior applications. In this study, we investigated the effects of the addition of nano MnO2 into urea-formaldehyde resin (UF) on the physicomechanical properties and formaldehyde emission of the bonded plywood. Two UF resins (a conventional as control and an innovative one with MnO2 nanoparticles (UFL)) were analyzed for their specifications with FTIR measurements both in their cured state. Differential scanning calorimetry (DSC) analysis was used to investigate the curing process. The formaldehyde emission decreased by 72.8 %, and the 3 h hot water soaking wet tensile shear strength improved by 74.5 % with the addition of 1.2 % (w/w)MnO2 nanoparticles compared to the UF resin control.
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