Preparation and characterization of polyaniline containing Fe ₃ O ₄ nanoparticles using sodium dodecylbenzenesulfonate as a surfactant

Abstract

Magnetic and conducting polyaniline (PAn)/Fe 3 O 4 nanoparticles were prepared in the aqueous solution by using sodium dodecylbenzenesulfonate (DBSNa) as a surfactant. The chemical structure and surface morphology of PAn/Fe 3 O 4 nanoparticles were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope. The conductivity of the composites was measured as a function of the Fe 3 O 4 content of the reaction solution. The magnetic properties of the resulting composites showed superparamagnetic behavior, such as saturated magnetization ( M s = 1.8 emu g - 1 ), remnant magnetization ( M r = 0), and coercive force ( H c = 0). The nanometer size (about 14 nm) Fe 3 O 4 in the composites causes of the superparamagnetic behavior of the product.