Abstract
•polyindole-PANI co-polymer@BiFeO3 composite was synthesized by hydrothermal in-situ polymerization.•XRD, UV–Vis, FESEM and VNA were used to evaluate the physicochemical and electromagnetic properties of the BiF/PoPa composite.•Reflection losses, matching loss capacity of the single layer BiF/PoPa absorber was also evaluated.•polyindole-PANI co-polymer@BiFeO3 nanocomposites was found to be influenced by filler loading content regulation.•Enhanced absorption bandwidth (EAB) of BiF/PoPa sample with 40 wt% shows 3.5 GHz bandwidth having minimum RL −17.8 dB.
It's still a significant difficulty to find microwave absorbers that have outstanding microwave dissipation performance in hostile environments. Herein, the core–shell structure of polyindole-PANI co-polymer@BiFeO3 nanocomposite is successfully prepared via in-situ polymerization method. The introduction of a co-polymer shell on the surface of magnetic BiFeO3 nanoparticles considerably tuned the attenuation constant and impedance matching characteristics. The electromagnetic characteristics and microwave absorption feature of the polyindole-PANI co-polymer@BiFeO3 nanocomposites may be found to be influenced by filler loading content regulation. The sample containing 40 wt% of polyindole-PANI co-polymer@BiFeO3 nanocomposite with a thickness of 1.5 mm had a minimum reflection loss of −17.8 dB and a 3.5 GHz effective absorption bandwidth at 13.6 GHz frequency. Polyindole-PANI co-polymer@BiFeO3 nanocomposite with outstanding microwave dissipation capabilities might be useful in a wide range of high-frequency wave applications.