The production process of carbon black pigment determines the morphology, structure and surface properties of its particles, which are directly related to the performance of carbon black. Different production processes will lead to differences in carbon black in terms of particle size, specific surface area, pore structure, surface functional groups, etc.
Particle size is one of the key factors in the performance of carbon black. Factors such as reaction temperature, reaction time and raw material selection in the production process will affect the particle size of carbon black. Carbon black with smaller particle size has a higher specific surface area and stronger light absorption and scattering ability, so it has higher blackness and tinting strength. However, too small a particle size may also increase the cohesion between carbon black particles and worsen dispersibility.
The pore structure of carbon black is also affected by the production process. Carbon black with rich pore structure can absorb more media and additives, improving its compatibility and stability in the application system. However, too complex a pore structure may affect the fluidity of carbon black.
The production process also affects the type and number of functional groups on the surface of carbon black. These functional groups have an important influence on the wettability, dispersibility, catalytic activity and electrochemical properties of carbon black. For example, carbon black with more carboxyl and phenolic hydroxyl groups on the surface usually has better wettability and dispersibility.
In addition, different production processes will also lead to differences in the aggregate structure of carbon black. High-structure carbon black aggregates are looser and have higher oil absorption values, which are suitable for rubber, plastic and other fields; while low-structure carbon black aggregates are tighter and easier to disperse, suitable for coatings, inks and other products.
The choice of production process will also affect the output and cost of carbon black. For example, furnace carbon black is the type with the largest output and the most varieties. It uses natural gas or high aromatic oil as raw materials and is generated by incomplete combustion or pyrolysis in the reactor. This method is relatively low-cost and suitable for large-scale production.
The production process of carbon black pigment has an all-round impact on its performance. Therefore, during the production process, it is necessary to select a suitable production process according to the performance requirements of the target product to ensure that the carbon black pigment can meet the requirements of specific applications.
