Polypyrrole coated Fe3O4 nanoparticles decorated carbon nanotubes nanocomposites and the microwave absorption properties

Polypyrrole coated Fe 3 O 4 nanoparticles decorated carbon nanotubes nanocomposites were prepared by in situ polymerization. The weight percentage of the Fe 3 O 4 nanoparticles was only 18.4% according to the analysis of TGA. The microwave absorption performance of the polypyrrole coated Fe 3 O 4 nanoparticles decorated carbon nanotubes nanocomposites was researched and the corresponding filler loading of paraffin in the tested samples was 80 wt%. The polypyrrole coated Fe 3 O 4 nanoparticles decorated carbon nanotubes nanocomposites showed a maximum reflection loss value of − 51.67 dB at 10.2 GHz, and the corresponding thickness and frequency bandwidth (≤ −10 dB) were 3.0 mm and 4.88 GHz, respectively. The composite materials have both magnetic loss and dielectric loss. The coupling between different materials and the improved impedance matching can enhance the absorbing performance.