Fabrication of the Fe-Doped Corona Schiff Base for Enhanced Microwave Absorption Performance.

A corolla-shaped Schiff base polymer was synthesized from terephthalaldehyde (TPAD), glutaraldehyde (GA), and -phenylenediamine (PPD) by block copolymerization, and Schiff base iron complexes were formed by doping with FeCl. The microscopic morphology, crystal structure, and elemental valence state were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Comparing the change of conductivity before and after Fe doping, it was found that the conductivity did not break away from the category of insulator, and the doped sample is a paramagnetic material.