Synthesis of conducting and magnetic nanocomposite of cross-linked aniline sulfide resin

Abstract

Magnetic and conducting aniline sulfide resin cross-linked (ASC-Fe3O4) nanocomposite has been prepared in the presence of aniline sulfide resin (ASR), aniline, <TEX>$Fe_3O_4$</TEX> coated by polyethylene glycol (PEG) and initiator. The magnetic properties of the resulting composites showed ferromagnetic behavior, such as high-saturated magnetization (Ms= 41 emu/g), and coercive force (Hc=1.5 Oe). The saturated magnetization was increased by increasing of <TEX>$Fe_3O_4$</TEX> content and decreased by increasing aniline ratio. The transmission electron micrograph (TEM) and X-ray diffraction proved that nanometer-sized about 20-30 nm <TEX>$Fe_3O_4$</TEX> in the composite. The average size of ASC-<TEX>$Fe_3O_4$</TEX> nanocomposite with core-shell structure was about 50-60 nm, and polydisperse. This approach may also be extended to the synthesis and modification of other polymers. Electrical conductivity of aniline sulfide resin cross-linked (ASC) nanocomposite has been studied by four-point probe method and produced <TEX>$3.3{\times}10^{-4}S/cm$</TEX> conductivity for it. The conductivity of the composites at room temperature depended on the <TEX>$Fe_3O_4$</TEX>, aniline ratio and doping degree. The thermogravimetry analysis (TGA) results showed that this resin is thermal resistance near of <TEX>$500^{\circ}C$</TEX>. So, It can be used for resistance thermal coating for military applications. <TEX>$Fe_3O_4$</TEX>-PASC nanocomposite has been flexible structure with electrical and magnetic properties.