Ultraviolet aging resistant PBO colored fiber and preparation method thereof

The invention belongs to the field of high polymer materials, and particularly relates to an ultraviolet aging resistant PBO colored fiber and a preparation method thereof. The method comprises the following steps: (1) pretreating a fiber surface layer; (2) loading a transition metal ion organic framework nano layer on the surface layer of the fiber; and (3) anchoring natural pigment molecules on the basis of the metal organic framework nanolayer, thereby completing the preparation of the ultraviolet aging resistant PBO colored fiber. The method comprises the following steps: firstly, loading a transition metal ion-loaded organic framework on the PBO fiber, and anchoring pigment molecules on the surface layer of the fiber in situ through the physical adsorption action such as Van der Waals force and the electrostatic adsorption action of zwitterions, so as to obtain the modified fiber with enhanced ultraviolet aging resistance and dyeing effect. The method is low in raw material cost and easy and convenient t