Method for preparing modified rubber, modified rubber, and bulletproof and puncture resistant tire

A method for preparing a modified rubber, comprising the steps of:

• irradiating high-performance short fibers by ultraviolet light;
• adding the irradiated high-performance short fibers to ethanol and stirring to prepare a uniformly dispersed fiber suspension;
• adding a coupling agent to the prepared fiber suspension;
• adjusting a pH value of the fiber suspension to a range from 8 to 9, and waiting for 2 to 4 hours at room temperature;
• adding sodium dodecylbenzenesulfonate into the fiber suspension and waiting for 1 to 2 hours to prepare a reaction solution;
• filtering the reaction solution under a reduced pressure to remove liquid from the reaction solution and prepare a modified fiber slurry;
• adding the modified fiber slurry into a carbon black and an inorganic filler to prepare a modified fiber slurry mixture;
• adding plasticized polar or non-polar rubber to an internal mixer and pressurized mixing for 1 to 2 minutes to prepare a rubber matrix;
• adding the modified fiber slurry mixture to the rubber matrix and further pressurized mixing for 1 to 2 minutes to prepare a mixed rubber compound;
• extruding the rubber compound from an open mill to prepare the modified rubber.