The invention discloses a preparation method for a rubber
composite material, and belongs to the field of the material preparation. The preparation method comprises the following steps: weighing silica
slurry, preparing suspension, stirring and pre-dispersing; dropwise adding a
coupling agent in a
room temperature, and adding silica; stirring and enabling the
coupling agent to be adequately and uniformly mixed with the
silica suspension, preparing activation modified
silica suspension; preparing white
carbon black by the same method; adjusting a pH value of a modified
silica suspension or modified white
carbon black dispersion
system, and weighing natural latex and adding to the dispersion
system, stirring and dispersing by using an electric stirrer; co-coagulating by using
calcium chloride solution, performing crepe,
pelletizing to obtain a silica or white
carbon black filled
natural rubber master batch; and mixing the white carbon black /
natural rubber master batch and the silica /
natural rubber master batch according to a matching ratio. After the silica is added, a
filler network of a white carbon black / silica filling
rubber material is more uniform, and
rolling resistance is reduced;
hardness of vulcanized rubber is slightly reduced, stress at definite elongation, tensile strength, tear strength and elongation at break are increased, and physical properties are improved.