The Synthesis and Magnetoelectric Properties of Tubular Polyaniline
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1091-AA07-19
The Synthesis and Magnetoelectric Properties of Tubular Polyaniline Yingli Liu1, Yuanxun Li2, and Huaiwu Zhang3 1 State key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, No 4th, Jianshe Bei Road,Chengdu,Sichuan,China, Chengdu, 610054, China, People's Republic of 2 State key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, No 4th, Jianshe Bei Road, Chengdu, Sichuan, China, Chengdu, 610054, China, People's Republic of 3 State key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, No 4th, Jianshe Bei Road, Chengdu,Sichuan, China, Chengdu, 610054, China, People's Republic of ABSTRACT The polyaniline was synthesized by in situ polymerization in the presence of β naphthalenesulfonic acid which acts as template. The structure, morphology and magnetoeletric properties of samples were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), the standard Van Der Pauw DC fourprobe method and vibrating sample magnetometer (VSM) techniques. The results indicated that polyaniline exhibited the hysteresis loops of the ferromagnetic nature and the conductance is high at 53.35 S/cm which possess both magnetic properties and electrical properties. INTRODUCTION Microstructure of polyaniline (PAn) has been a subject of intense research because of its good processibility, environmental stability and adjustable electro-optical properties as well as its potential for a variety of applications in many areas of electronics, photonics, mechanics, and sensing[1-4]. In recent years, the morphologies of PAn like needles, wires and tubules have been reported, depending on synthetic methods such as template method, in situ doping polymerization and even physical methods which were found to have strong influence on its properties. Among them, Wan et al.[5] studies the synthesis and experimental conditions of PAn microtubules, Long et al.[6] reported the preparation of PAn nanotubes containing Fe3O4 nanoparticles, but their research had not included the structural and magnetoelectric properties of PAn microtubules.
EXPERIMENT PAn microtubules doped with
β-naphthalenesulfonic acid (NSA), using Ammonium
persulfate (APS) as the oxidant in deionized water were prepared by in situ doping polymerization method[7]. The typical synthesis process of PANI is as follows: (NH4)2S2O8 (APS) as the oxidant was dissolved in deionized water and was added slowly into the mixture
β-naphthalenesulfonic acid (NSA). After all the oxidant was added, the reaction mixture was stirred at 0-5℃ for 36h. The precipitate was then washed with deionzed
containing aniline and
water, methanol, and ethyl ether several times, and finally dried at room temperature in a dynamic vacuum for 48h. DISCUSSION The structure of PAn microtubules were characterized by scanning electron microscopy (SEM), Four
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