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

Abstract

Magnetic and conducting polyaniline (PAn)/Fe₃O₄ nanoparticles were prepared in the aqueous solution by using sodium dodecylbenzenesulfonate (DBSNa) as a surfactant. The chemical structure and surface morphology of PAn/Fe₃O₄ 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 ₃O₄ 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) Fe₃O₄ in the composites causes of the superparamagnetic behavior of the product.