Surface high-temperature treatment is to subject precipitated silica to high-temperature heat treatment to remove some molecules adsorbed on the silica surface, that is, water and other low-molecular-weight adsorbates. As a result, some vulcanization properties can be improved, but the effect is not significant. Surface chemical treatment is to use certain chemical reagents to react with the surface active silanol groups of the white carbon black to improve the affinity and reactivity of the white carbon black with the polymer compound. There are many reagents that can chemically treat the surface of white carbon black, and the methods for chemical treatment are also various. There are many documents and patents on this aspect. The following is a brief introduction.

The specific process methods used are:

(1) Steam method: Directly contact the dry white carbon black with the steam of organic matter to cause the required reaction;

(2) Reflux method: boil the white carbon black together with the reaction liquid to reflux, and the desired reaction occurs;

(3) Autoclave reaction method: The white carbon black and the reaction liquid are heat-pressed in an autoclave to cause a specified reaction. The specific chemical reactions used are: as the degree of hydration increases, the isolated silanol groups gradually decrease, while the ortho-position silanol groups gradually increase. The ortho-type silanol group has a strong adsorption capacity for water and polar substances.