Performance of Wood Flooring UV Coatings Interfacial Modified by Nano-Silica

Abstract

Cork flooring maintains the natural qualities of cork, showing the unique and elegant natural patterns, and also has series of advantages such as thermal insulation, sound insulation, moisture barrier, insulation, and no static. Ultraviolet (UV) curable coatings have no volatile organic compounds, little environmental pollution, fast curing, and are suitable for high speed automated production, which is the development of environmentally friendly wood floor coatings. In this paper, the UV-curable wooden coatings for floor were interfacially modified with nanosilica. The process parameters were optimized by orthogonal experiments, and the overall performance of wood flooring UV coating was obtained. The mechanical properties of the coating (hardness, adhesion and impact strength), resistance to liquid properties (resistance to aqueous sodium chloride solution, resistance to aqueous sodium hydroxide solution, resistance to alcohol, resistance to blue and black ink, resistance to sauce) and gloss were tested. It was found that wood flooring UV coating had good performance, hardness reached 3H, adhesion reached one grade, impact strength was 40 kgcm, and fluid-resistant performance (120 h) of coating reached one grade when the nanosilica content was 0.50%~0.70%, the drying time was 2 min, and medium pressure mercury UV lamp was 3. The gloss results showed that gloss of wood flooring UV coatings decreased with the increase of nanosilica content. When the nanosilica content was 0.50%~0.70%, the gloss value was in the vicinity of 35%, showing a matte gloss. This study provides new perspectives in wood flooring UV coating for industrial applications.