Preparation of n-type polyaniline/hexagonal boron nitride composites with a large thermoelectric power factor


UĞRAŞKAN V., Ceran E., YAZICI Ö.

POLYMERS & POLYMER COMPOSITES, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1177/09673911211042504
  • Title of Journal : POLYMERS & POLYMER COMPOSITES
  • Keywords: Polyaniline, hexagonal boron nitride, thermoelectric, composite, n-type semiconductor, CARBON NANOTUBES, CONDUCTIVITY, PERFORMANCE, NANOSHEETS, TRANSPORT, PROPERTY, FILMS

Abstract

In the present study, it was aimed to investigate the thermoelectric (TE) properties of polyaniline/hexagonal boron nitride (PANI/h-BN) composites. First, h-BN was synthesized from boric acid and urea. Then, PANI-HCl was synthesized by oxidative chemical polymerization. Finally, the composites were prepared using different weight ratios of h-BN. The composites were characterized using attenuated total reflection accessory attached Fourier-transform infrared spectroscopy, UV-vis spectroscopy, X-ray diffraction, and scanning electron microscopy/energy dispersive X-ray analyzer. TE investigation of the composites showed that the addition of h-BN significantly contributes to the TE properties of PANI-HCl. The addition of h-BN increased the power factor of PANI-HCl from 0.07 mu Wm(-1)K(-2) to 143.05 mu Wm(-1)K(-2). Furthermore, all the composites showed negative Seebeck coefficients which are the characteristics of n-type semiconductors.