Effect of Photoinitiator Concentration and Film Thickness on the Properties of UV-Curable Self-Matting Coating for Wood-Based Panels

Matte coatings have found wide-ranging applications across diverse industries. In this study, self-matting films with surface wrinkles were produced by exposing UV-curable polyurethane acrylate (UV-WPUA) resin to 172 nm Xe2* excimer and medium-pressure mercury lamps. The gloss values, micromorphologies, water contact angles (WCAs), roughness friction behaviors of UV-WPUA different photoinitiator (PI) concentrations thickness investigated for the first time. results indicate that values at same enhance increase PI concentration, while amplitude wrinkles, roughness, WCAs decrease; however, coefficient shows insignificant variations. While concentration is unchanged, an in film a decrease value coefficient. Nevertheless, WCA relatively constant. 0.5 wt% (lowest cured film) was utilized prepare wood coating. coating exhibited low (4.9 GU 60° 5.2 85°) outstanding mechanical properties, including 3H pencil hardness, grade 0 adhesion, excellent wear resistance, tensile property. These findings can be guide development production wood-based panels used industrial finishing.