Poly(o-ethoxyaniline) / Fe3O4 nano-multilayer films were prepared by layer-by-layer electrostatic selfassembly.
Poly(o-ethoxyaniline) was synthesized by chemical oxidation and Fe3O4 fluid was obtained by hydrothermal
method. The morphologies, electromagnetic parameters and microwave absorbing properties of the film were characterized
by means of scanning electron microscope (SEM) and vector network analyzer. The SEM picture indicated that
the film was sheeted. The film had both magnetic loss and dielectric loss, but had magnetic loss predominantly. Besides,
in the lower frequency range (8-10 GHz), when the thickness of the film was 3. 5 mm, microwave absorbing
effect is better and the minimal reflection loss is -11. 5 dB. In the lower frequency range (10-12. 5 GHz), the minimal
reflection loss is -10. 4 dB when the thickness of the film was 2. 5 mm.