Abstract
In order to expand the scope of electromagnetic wave absorbers, the ternary composites composed of graphene, branching-like polypyrrole and CoFe2O4 nanoparticles were synthesized. TEM results indicated that polypyrrole on the surface of graphene had a branching-like geometrical morphology and the diameter of CoFe2O4 nanoparticles ranged from 5 to 15nm. The electromagnetic wave absorbability revealed that the ternary composites exhibited excellent electromagnetic wave absorption properties. The maximum reflection loss was up to −50.8dB at 14.5GHz and the absorption bandwidths with the reflection loss exceeding −10dB were 4.2GHz with a thickness of only 1.5mm. Furthermore, our development strategies confirmed that the surface modification of graphene with branching-like polypyrrole and CoFe2O4 nanoparticles could make the ternary composites have a promising future in electromagnetic wave absorption materials.
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