How to choose high performance conductive carbon black?
May 30, 2022
Conductive carbon black is a special kind of carbon black, and they must have these basic characteristics, such as large specific surface area, less impurities to capture electrons, and good crystallinity.
The structure of conductive carbon black is the degree to which very fine carbon black particles are aggregated into chains or grapes, which is determined by the size and shape of the aggregates and the number of particles in each aggregate; the more particles that make up the aggregates , the higher the structure; the greater the probability of forming a network structure, the better the conductivity:
Carbon blacks composed of agglomerates composed of a large number of branched and cross-linked primary particles are referred to as "high-structure" carbon blacks. The higher the structure, the more developed the chain-like or grape-like structure is, the easier it is to form a spatial network channel, and it is not easy to be damaged.
High-structure carbon black has fine particles, tightly packed network chains, large specific surface area, and many particles per unit mass, which is conducive to the formation of a chain conductive structure in polymers.
Generally, the oil absorption value (DBP) is used to characterize the porosity of carbon black, that is, the structure.
