Electromagnetic interference shielding effectiveness of ferrocene‐based polyimidazole/carbon material composites
Ahsan Nazir, Haojie Yu, Li Wang, Jinhua Liu, Songbiao Li, Bilal Ul Amin, Kaleem‐ur‐Rahman Naveed, Rizwan Ullah Khan, Amin Khan, Muhammad Usman, Tarig Elshaarani, Md Alim Uddin
Abstract
Abstract Ferrocene‐based polyimidazole (PPIFc) composites containing multiwalled carbon nanotube (MWCNT), reduced graphene oxide (RGO), and carbon black (CB) were prepared by chemical oxidative polymerization, respectively. The prepared PPIFc/MWCNT, PPIFc/RGO, and PPIFc/CB composites were characterized by scanning electron microscope, transmission electron microscope, Fourier transform infrared, X‐ray diffraction, X‐ray photoelectron spectroscopy, and thermogravimetric analysis. The electrical conductive property of the PPIFc/MWCNT, PPIFc/RGO, and PPIFc/CB composites was tested by a four‐probe method. The electromagnetic interference (EMI) shielding properties of the composites were measured by a coaxial method in the 1 to 4.5 GHz. These PPIFc/MWCNT, PPIFc/RGO, and PPIFc/CB composites showed good EMI shielding performance and total shielding effectiveness (SE T ) for PPIFc/CB was −11.2 dB, PPIFc/RGO was −13.1 dB, and PPIFc/MWCNT was −25.4 dB by using 50 wt% of the composite in the paraffin wax.