Nano-Al_2O_3 Whiskers as an Additive for Amino Resin-Based Wood Adhesives - Effect on the Performance of the Wood-Wood Joints

摘要

In this work, we investigated the effect of the addition of nano-Al_2O_3 whiskers on the physiochemical and mechanical properties of urea-formaldehyde (UF) and melamine-urea-formaldehyde (MUF) cured adhesive systems as well as the mechanical properties of the wood-wood joints. A two-layer beech wood assembly was used as a model for joint tests. Mechanical studies were performed on die-cast bar-shaped samples. It was found that low addition of nanoparticles significantly affects hardness and compressive shear strength of the cured polymer. It was also shown that blending UF/MUF resins with "nano-modifiers" can be an effective tool for controlling both physiochemical and mechanical properties of the cured adhesive systems.