Cellulose acetate derivative and preparation method and application thereof

The invention provides an cellulose acetate derivative. The structural formula of the cellulose acetate derivative is shown in the specification. The invention provides a preparation method of the cellulose acetate derivative, and the method comprises the steps that triclosan sodium phenolate and alpha-chloroacetic acid are utilized to prepare 2',4',4-trichlorine-2-[(alpha-acetic acid)ether-]diphenyl ether; cellulose acetate is weighed, the 2',4',4-trichlorine-2-[(alpha-acetic acid)ether-]diphenyl ether is added to the cellulose acetate, 1-(3-dimethylamino propyl)-3-ethyl carbodiimide and 4-dimethylamino pyridine are added simultaneously, a reaction is conducted, and the 2',4',4-trichlorine-2-[(cellulose acetate)ether]-diphenyl ether is obtained. The invention further provides application of the cellulose acetate derivative in preparing anti-bacterial fabric. According to the cellulose acetate derivative and the preparation method and application thereof, combination of triacetate cellulose and triclosan is a