Cellulose derivative as well as preparation method and application thereof

The invention discloses a cellulose derivative as well as a preparation method and application thereof, and aims to provide a cellulose butyral derivative with hydrophilic hydroxyls and hydrophobic butyral groups. The preparation method is simple and easy to implement, moderate in reaction condition and high in cellulose derivative yield, and can be applied to the preparation of a film. The technical scheme of the method is as shown in the specification, and belongs to the technical field of cellulose derivatives.