Preparation method and application of photochromic film

• Main Authors: SU ZHUO, AUGUSTINE CARL, ZHOU GUOFU
• Format: Patent
• Language: Chinese; English
• Published: 26.05.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention discloses a preparation method and application of a photochromic film, and the preparation method of the photochromic film comprises the following steps: S1, mixing a solution containing a tungsten compound with a polymer or a light-cured resin solution to obtain a precursor solution; and S2, the precursor solution is oscillated for 0.5-1.5 h and then evaporated for 1-2 h, and the photochromic film containing in-situ generated tungsten oxide is obtained. According to the photochromic film disclosed by the invention, under the irradiation of ultraviolet light, the transmissivity of visible light and near-infrared light is reduced, and the color of the film is darkened, so that the solar heat is blocked; and after the ultraviolet light is removed, the transmissivity of the visible light and the near-infrared light is recovered, the color of the film is recovered, and the film has good color changing performance. In addition, a photochromic film and an artificial ultraviolet light source are integr