When it comes to post-treatment of carbon black, it refers to post-treatment of carbon black oxidation. Many manufacturers who use carbon black will post-treat carbon black before adding it to the base material when using carbon black. What are the advantages? Why do manufacturers first oxidize carbon black before using it? Here, the editor of Carbon Black Industry Network (www.tanhei.com) will introduce relevant information about carbon black post-treatment.
Why should carbon black be post-treated?
The purpose of post-oxidation treatment of carbon black is to change the surface chemical properties. For pigment carbon black, in order to make the paint or ink system form a stable colloidal dispersion, it is necessary to improve the dispersion of carbon black pigments in polar solvents. Therefore, it is necessary to introduce oxygen-containing functional groups on the surface of carbon black to polarize the surface, that is, to modify the surface.
Method of post-treatment of carbon black oxidation
There are many post-treatment methods for carbon black surface modification and oxidation, such as hot air oxidation, nitric acid oxidation, ozone oxidation, helium oxide oxidation, and low-temperature plasma oxidation.
Advantages of Carbon Black Oxidation Post-Treatment
The post-oxidation treatment of carbon black is to change the functional groups on the surface of carbon black. The pH index of carbon black is determined by the acidity and alkalinity of the functional groups on the surface of carbon black, and different functional groups on the surface of carbon black can chemically react with different base materials. It is beneficial to the dispersion of carbon black and the combination with the base material. In fact, regardless of the oxidation treatment of carbon black, carbon black must be added to the base material after treatment in order to better disperse in the base material. The carbon black after oxidation treatment not only has the advantage of being easy to disperse, but also improves the viscosity, stability and fluidity of the carbon black, and is better combined with the base material, so that the cost does not fade and does not fade.