Preparation and electromagnetic properties of the BaFe12O19/multiwall carbon nanotubes/poly(3‐methyl‐thiophene) composites

The BaFe₁₂O₁₉/multiwall carbon nanotubes/poly(3‐methyl‐thiophene) (BaFe₁₂O₁₉/MCNTs/P(3MT)) composites were synthesized through an in situ chemical polymerization of 3‐methyl‐thiophene (3MT) in the presence of BaFe₁₂O₁₉/MCNTs composite powders. The BaFe₁₂O₁₉/MCNTs/P(3MT) composites were characterized by the fourier transform infrared spectrometry (FTIR) and X‐ray diffraction (XRD). The morphologies of the composites were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electric conductive properties were tested by a four‐probe conductivity tester and the magnetic properties were measured by vibrating sample magnetometer (VSM). The electromagnetic performance tests showed that when the mass ratio of BaFe₁₂O₁₉ to MCNTs was 0.4, and the BaFe₁₂O₁₉/MCNTs to P(3MT) was 0.15, the conductivity, saturation magnetization (M_s) and residual magnetization (M_r) of the BaFe₁₂O₁₉/MCNTs/P(3MT) composites achieved 166.740 S/m, 29.884 emu/g, and 17.581 emu/g, respectively. POLYM. COMPOS., 34:1801–1808, 2013. © 2013 Society of Plastics Engineers