Anti-yellowing smooth master batch for TPU (thermoplastic polyurethane), preparation method of anti-yellowing smooth master batch and anti-yellowing TPU film

The invention discloses an anti-yellowing smooth master batch for TPU, a preparation method thereof and an anti-yellowing TPU film. The preparation method comprises the following steps: S1, ultrasonically dispersing mesoporous silica in an ethanol-water mixed solution, adding a silane coupling agent, dropwise adding glacial acetic acid to adjust the pH value of the mixed suspension, and reacting for several hours; after the reaction is finished, centrifugally washing the reaction liquid, thoroughly drying the precipitate, and grinding and crushing; s2, putting the successfully modified mesoporous silica into a closed high-speed mixer with a temperature control function, heating, adding a slipping agent, stirring to react for a plurality of hours, and grinding; and S3, granulating by using a double-screw extruder. According to the anti-yellowing smooth master batch for TPU, the preparation method of the anti-yellowing smooth master batch and the anti-yellowing TPU film, the functions of the organic slipping ag