Preparation method of epoxidized natural rubber masterbatch with highly dispersed nano-silicon dioxide/carbon black

The invention discloses a preparation method of an epoxidized natural rubber masterbatch with highly dispersed nano-silicon dioxide/carbon black, which comprises the following steps: performing ultrasonic dispersion on nano-silicon dioxide modified by a silane coupling agent and carbon block after liquid phase oxidation by an oxidant by using deionized water, then adding the nano-silicon dioxide into epoxidized natural rubber latex, stirring, finally performing steam solidification or solidification by a solidifying agent, drying, and getting the epoxidized natural rubber masterbatch with the highly dispersed nano-silicon dioxide/carbon black. Compared with the mechanical properties of the masterbatch prepared by adding the same parts of the nano-silicon dioxide/carbon black powder, the mechanical properties of the masterbatch are as follows: the 100% modulus is improved from 2.3MPa to 3.1-3.4MPa, the 300% modulus is improved from 9.2MPa to 10.1-11.6MPa, the tensile strength is improved from 31.2MPa to 33.5-36.8 MPa, the elongation at break is improved from 625% to 647%-688%, and the tearing strength is improved from 48.3N/mm to 53.8-58.3N/mm; furthermore, the process is simple, and the large-scale production is easy.