Hyperbranched polysiloxane modified azobenzene, and preparation method and application thereof

The invention discloses hyperbranched polysiloxane modified azobenzene, and a preparation method and application thereof. The method comprises the following steps: uniformly stirring trialkyl silane containing epoxy group and absolute ethyl alcohol, feeding ethanol solution of azobenzene, performing reaction for 10 to 60 hours at 40 to 80 DEG C, performing reduced pressure distillation on the reaction liquid, so as to obtain organic silicon modified azobenzene, dissolving the organic silicon modified azobenzene in absolute ethyl alcohol, sequentially feeding trimethylsiloxy silane containing epoxy group and trimethylsiloxy silane containing vinyl, uniformly stirring, rising the temperature to 50 to 70 DEG C, performing reflux condensing, dropwise feeding distilled water, feeding sodium hydroxide to control the pH value of a system, stirring, and performing heat preservation and reduced pressure distillation, so as to obtain the hyperbranched polysiloxane modified azobenzene. The hyperbranched polysiloxane modified azobenzene introduces active reaction groups on the basis that the photochromic property of the azobenzene compound is kept, and can be used for preparing hyperbranched polysiloxane modified azobenzene and acrylic ester copolymer emulsion.