High temperature surface treatment refers to high-temperature heat treatment of precipitated white carbon black to remove some molecules adsorbed on the surface of white carbon black, namely water and other low molecular weight adsorbates. As a result, partial vulcanization characteristics can be improved, but the effect is not significant. Surface chemical treatment is to use some chemical reagents to react with the surface active silanol group of white carbon black, so as to improve the affinity and reaction activity of white carbon black and polymer compound. There are many reagents that can chemically treat the surface of white carbon black, and there are various methods of chemical treatment. There are many literatures and patents on this field. The following is a brief introduction.


The specific process methods are:


(1) Steam method: the dry white carbon black is directly contacted with the steam of the organic matter to generate the required reaction;


(2) Reflux method: boil white carbon black and reaction liquid together for refluxing to generate desired reaction;


(3) Hydrothermal reaction method: the white carbon black and the reaction solution are hot pressed in an autoclave to make it react as specified. The specific chemical reactions adopted are as follows: with the increase of hydration degree, the isolated silanol group gradually decreases, while the ortho silanol group gradually increases. Ortho silanol group has strong adsorption capacity for water and polar substances.