Synthesis in inital neutral solution and property study of polyaniline/Fe_3O_4 nanocomposites

Polyaniline(PANi)/Fe3O4 nanocomposites were synthesized in the initial neutral solution via in situ chemical oxidative polymerization under the direction of cationic surfactant.The morphology,structures,electric and magnetic properties of the nanocomposites were studied by high-resolution transmission electron microscopy(HRTEM),X-ray diffraction(XRD),Fourier transform infrared(FT-IR) spectra,vibrating sample magnetometer and so on.The formation mechanism of the PANi/Fe3O4 nanocomposites was also analysed.The results showed that the Fe3O4 nanoparticles were coated by PANi.There were interactions between Fe3O4 nanoparticles and PANi,which was beneficial to the coating of Fe3O4 nanoparticles by PANi.The nanocomposites have both conductibility and magnetic performance,and their conductivity decreases and saturation magnetization increases when the Fe3O4 content is improved.