Conductive coatings are coated on non-conductive substrates, and the coating itself has a certain ability to conduct current and dissipate charges. According to its conductive type, it can be divided into resistance coatings, radio wave shielding coatings, radio wave absorbing coatings, heating coatings, anti-static coatings, electric field mitigation coatings, etc.
The main film-forming substance of conductive coating is polymer, so its conduction principle is mainly to study the conduction of polymer. Conductive polymers can be divided into two categories: blended additive conductive polymers and intrinsic structural conductive polymers. The blended conductive polymer itself has no conductivity, and its conductivity is achieved by doping conductive particles; the intrinsic structure conductive polymer itself has inherent conductivity, and the polymer molecular structure provides conductive carriers. Due to many difficulties in the synthesis and construction of intrinsic conductive coatings, high , and unsatisfactory performance, it has not yet reached the stage of large-scale production, so the current practical conductive coatings are mostly blended conductive coatings. .
The application purpose of conductive coatings is different, and the required conductivity is also different. The table below lists the resistivity of conductive coatings for several uses.
Compared with other techniques for obtaining conductive films such as plastic electroplating and vacuum sputtering, conductive coatings have the advantages of simple equipment, convenient construction, low cost, and are suitable for complex surface coating.
