With the rapid development of electronic information technology, the application of electromagnetic wave is more and more extensive.The electromagnetic waves in the environment will not only interfere with the electromagnetic control system and lead to equipment failure, but also harm human physical and mental health.Therefore, it is of great significance to develop absorbing materials with electromagnetic wave absorption capacity.In addition, the application value in military stealth technology has greatly promoted the research on absorbing materials.The graphene-coated ZnO hollow sphere (gs-zno) was prepared by the combination of hydrothermal reaction and surface modification of polyurethane absorbing material, and the rgo sheet was successfully adhered to the surface of the ZnO hollow sphere composed of nanoparticles.This special structure effectively reduces the density of the material without sacrificing contact between graphene and nanoparticles.In addition, by adjusting the mass ratio of graphene to ZnO, high electromagnetic absorption properties can be obtained.
Application:
Polyurethane absorbing materials are used as anechoic chamber auxiliary materials, including plate type and support type, for testers to walk in anechoic chamber.