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Effect of different carbon fillers and dopant acids on electrical properties of polyaniline nanocomposites

Publication Type : Journal Article

Publisher : Bulletin of Materials Science

Source : Bulletin of Materials Science, Volume 36, Number 1, p.37-44 (2013)

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Keywords : Camphor sulfonic acids, Carbon black, Carbon nanotubes, Conducting nanocomposites, Doping (additives), electric conductivity, Electrical conductivity, Electrochromic displays, Fillers, Four-point probe techniques, Fourier transform infra red (FTIR) spectroscopy, Fourier transform infrared spectroscopy, Microelectronics, Nanocomposites, Organic acids, Polyaniline, Polyaniline nanocomposites, scanning electron microscopy, Structural and electrical properties, Thermogravimetric analysis, Ultraviolet visible spectroscopy, X ray diffraction

Campus : Coimbatore

School : School of Engineering

Department : Chemical

Verified : Yes

Year : 2013

Abstract : Electrically conducting nanocomposites of polyaniline (PANI) with carbon-based fillers have evinced considerable interest for various applications such as rechargeable batteries, microelectronics, sensors, electrochromic displays and light-emitting and photovoltaic devices. The nature of both the carbon filler and the dopant acid can significantly influence the conductivity of these nanocomposites. This paper describes the effects of carbon fillers like carbon black (CB), graphite (GR) and muti-walled carbon nanotubes (MWCNT) and of dopant acids like methane sulfonic acid (MSA), camphor sulfonic acid (CSA), hydrochloric acid (HCl) and sulfuric acid (H2SO4) on the electrical conductivity of PANI. The morphological, structural and electrical properties of neat PANI and carbon-PANI nanocomposites were studied using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy and the four-point probe technique, respectively. Thermogravimetric analysis (TGA) and X-ray diffraction (XRD) studies were also conducted for different PANI composites. The results show that PANI and carbon-PANI composites with organic acid dopants show good thermal stability and higher electrical conductivity than those with inorganic acid dopants. Also, carbon-PANI composites generally show higher electrical conductivity than neat PANI, with highest conductivities for PANI-CNT composites. Thus, in essence, PANI-CNT composites prepared using organic acid dopants are most suitable for conducting applications. © Indian Academy of Sciences.

Cite this Research Publication : E. J. Jelmy, Ramakrishnan, S., Rangarajan, M., and Dr. Nikhil K. Kothurkar, “Effect of different carbon fillers and dopant acids on electrical properties of polyaniline nanocomposites”, Bulletin of Materials Science, vol. 36, pp. 37-44, 2013.

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