Researth progress in preparation of ferrite/polyaniline absorbing composites by in situ polymerization

Abstract

Electromagnetic (EM) pollution has become the fourth largest pollution after air pollution, water pollution and noise pollution. Using of EM absorbing materials is an effective way to solve electromagnetic pollution problem, due to their absorption and attenuation characteristics. Polyaniline (PANI), as a kind of resistance loss absorbing material, can meet the development concept of "thin thickness" and "light mass" of absorbing materials. However, its absorbing performance is not ideal due to its poor impedance matching, ferrite, as a kind of traditional magnetic loss-type absorbing material, is limited in its application range due to its high density. The high-density ferrite and low-density polyaniline composite wave-absorbing material can not only adjust the density of the composite material, but also improve the impedance matching, and the wave-absorbing performance of the ferrite/polyaniline composite. In this paper, the preparation methods of polyaniline and ferrite/polyaniline composites were discussed firstly. Secondly, the absorbing mechanism of ferrite/polyaniline composites was expounded. Then, the research progress of composite materials prepared by spinel type, magnetic lead type, garnet type ferrite and polyaniline in the field of wave absorption was summarized, respectively. Finally, the future development directions of ferrite/polyaniline composites were pointed that they should tend to electromagnetic simulation and multi-element composites.

Keywords

• polyaniline
• spinel type ferrite
• magneto-plumbite type ferrite
• garnet type ferrite
• in situ polymerization
• electromagnetic absorbing material
• composite