How much do you know about the properties of conductive carbon black products?

Conductive carbon black is carbon black with low or high resistance. It can impart electrical or antistatic effects to the product. It is characterized by small particle size, large specific surface area and roughness, high structure, and clean surface (less compounds).

With the continuous development of the economy, the actual demand for conductive carbon black in the industry is increasing, and its performance is very outstanding, so it is very popular. Carbon black particles with a broad particle size distribution are reported to have higher electrical conductivity than carbon black particles with a narrow particle size distribution, which can be explained statistically. Carbon black has a broad particle size distribution that needs to be compensated with small amounts of large particle size. The overall particle size distribution of the conductive carbon black is larger than that of the conductive carbon black having a narrow particle size distribution. What are the features of their products and how much do you know? Now let's introduce it.

Compared with other conductive fillers, conductive carbon black has a reinforcing effect on plastics and rubber. In addition, by controlling the amount of conductive carbon black added, polymers with different electrical conductivity can be obtained.

The conduction of conductive carbon blacks can be explained by conduction band and tunneling effects, and in conductive carbon black filled polymers, conduction occurs by contacting or separating particles into small gaps. The average distance of internal aggregates is affected by many parameters, including the concentration, structure, size and shape of aggregates, size distribution, mixing effects, temperature, etc. According to the production method, the raw materials of the conductive carbon black can be classified into several types, and only one of them is suitable for the conductive filler. They have some basic properties such as large specific surface area, less trapped electron impurities and good crystallinity.

The structure of conductive carbon black is expressed by the degree to which the carbon black particles aggregate into chains or grapes. Carbon blacks composed of aggregates, which consist of the size, shape, and number of particles in each aggregate, are referred to as highly structurally conductive carbon blacks. Currently, oil absorption values are often used to represent structures. The higher the oil absorption value, the higher the structure of the conductive carbon black. Space network channels are easy to form and less prone to damage. The fine particles of high-structure carbon black, the accumulation of tight network chains, the larger specific surface area and the unit mass of the particles are more conducive to the formation of the chain conductive structure in the polymer, among which acetylene-carbon is in various conductive carbon blacks, black Better performance.