Carbon black is divided into alkaline and acidic. The acidity and alkalinity of carbon black are mainly seen through the pH value of carbon black. From the outside, there is no difference between alkaline carbon black and acidic carbon black, but in There are still some subtle differences in use. What are the differences between acidic and basic carbon black today? How to choose carbon black acidity and alkalinity.
The reason why carbon black has acidity and alkalinity
Generally, the acidity and alkalinity of the carbon black produced is fixed. Specifically, whether it is acidic carbon black or basic carbon black is related to the production process of carbon black. Generally speaking, the pH value of channel carbon black is weakly acidic. It can delay the vulcanization of rubber; the pH value of furnace carbon black is alkaline, which will promote the vulcanization of rubber. Carbon black not only has a specified acidity and alkalinity during production, but also can change the acidity and alkalinity of carbon black in post-processing.
The difference between acidity and alkalinity of carbon black
Acidic carbon black is acidic carbon black containing active groups on the surface, while basic carbon black is alkaline carbon black containing active groups on the surface.
What are the selection methods of acidity and alkalinity of carbon black
Regarding the choice of acidity and alkalinity of carbon black, it mainly depends on the formulation of the production process. Different process formulations have different requirements for the acidity and alkalinity of carbon black. To put it simply, the acidity and alkalinity of carbon black is determined by the active groups on the surface, and the active groups on the surface need to chemically react with other raw materials. If other raw materials can react with the active groups on the acidic surface, you must choose acidic carbon black. , can react with the active groups on the alkaline surface to choose alkaline carbon black. For more questions about which is better, acidic carbon black or basic carbon black, you can click to read: What does the pH value of carbon black represent, and which is better, basic carbon black or acidic carbon black?
Application of basic carbon black and acid carbon black
There is no difference between basic carbon black and acidic carbon black, but according to the editor's investigation, the use of acidic carbon black is greater than that of basic carbon black.