Polyphenyl sulfone composite material as well as preparation method and application thereof

The invention discloses a polyphenyl sulfone composite material which comprises the following components in percentage by weight: 95-99% of polyphenyl sulfone resin; 1 to 5% of fluorine-containing siloxane; 0.1 to 0.5 part of a silane coupling agent; wherein terminal hydroxyl groups in the polyphenyl sulfone resin account for 20-30 mol% of the total molar content of terminal groups. According to the invention, the polyphenyl sulfone resin with specific terminal hydroxyl group content is compounded with the fluorine-containing siloxane, the surface free energy is reduced by utilizing the low intermolecular cohesion of fluorine atoms and utilizing the interaction force between hydroxyl terminal groups and the fluorine-containing siloxane modifier, so that the surface friction coefficient of the material is low, and the material is endowed with excellent stain resistance and oil resistance. The defects that the surface tension of the material cannot be effectively reduced and the toughness is reduced due to poor