Abstract: The effect of the amount of carbon fiber and carbon nanotubes treated with silane coupling agent and dopamine on the wear resistance and tensile strength of the compound tread adhesive was studied to improve the wear resistance and mechanical properties of the tire tread to extend its servise life. The experimental scheme was designed and arranged by the method of quadratic regression orthogonal design. Mechanical properties and tribological properties of rubber materials were measured by universal testing machine and DIN wear meter. An improved multi-objective optimization algorithm based on NSGA-II was used to optimize the test indexes. The response surface was drawn and the best combination of parameters was obtained by the Pareto optimal solution set of the original model. The results show that the abrasion loss is 139.7 mm3, and the fracture strength is 20.8 MPa by 82.66 phr （parts per hundred） for natural rubber, 7.43 phr for carbon nanotubes and 6 phr for carbon fiber, showing that the carbon fiber/carbon nanotube composite tread adhesive has good wear resistance and tensile properties.

Key words: composites, carbon nanotubes, carbon fiber, fracture strength, wearing capacity, multi-objective optimization algorithm