Preparation of UV-Curable Nano-WO 3 Coating and Its Infrared Shielding Properties.

Nano-WO particles are expected to find use in new shielding materials because of their significant absorption of near-infrared light in the 1400-1600 nm and 1900-2200 nm bands and high transmittance of visible light. In this study, WO was ground and dispersed using high-energy ball-milling to prepare a nano-WO dispersion using BYK331 as the dispersant and ethanol as the solvent. The prepared nano-WO dispersion was added to a photo-curing system and cured using UV irradiation to form films. The cured films were characterized using FT-IR, SEM, XRD, and TGA. The results showed that the nano-WO powder was evenly dispersed in the coating. The infrared blocking rate of the film continuously improved and the visible light transmission rate continuously decreased with increasing amounts of nano-WO.For the film containing 6 wt%nano-WO, the infrared blocking rate of the coating is 90%, the visible light transmittance is 70%, the hardness of the coating is 3B, and the adhesion is 3H. The thermal stability of the coating is also improved.