Nano Cesium Tungsten Bronze Applied for Exhibition Hall Thermal Insulating Film

Nano cesium tungsten bronze is a new nanomaterial with excellent infrared absorption properties so that the exhibition hall thermal insulating film prepared using such functional material as raw material has high visible light transmittance of over 71% and low infrared light (800-2500nm) transmittance of 13.5%. Some experts prepared the cesium tungsten bronze nano powder by solvothermal process using tungstic acid and cesium sulfate as raw materials, and sorbitol as solvent at 350 °C.

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In addition, the experts used a sand mill to prepare cesium tungsten bronze aqueous nano slurry with a D50 of 55.9 nm and a solid content of 30% (mass fraction). And the slurry was added to an acrylic emulsion to coat the surface of the polyester film. And then a transparent infrared absorbing film was obtained. The transmittance of the prepared film at 950 nm was measured to be 9.2%, the visible light transmittance at 550 nm was 71%, and the haze was 0.5%. That is to say, the exhibition hall thermal insulating film of nano cesium tungsten bronze has excellent infrared absorption properties.

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