Electrical conductivity of anionic surfactant-doped polypyrrole nanoparticles prepared via emulsion polymerization

H. Ghalib, I. Abdullah, Rusli Daik

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Conducting polypyrrole (PPy) nanoparticles were synthesized by chemical oxidative polymerization of pyrrole in aqueous solution containing ferric sulfate (Fe2(SO4)3), anionic surfactants (sodium dodecylbenzene-sulfonate (NaDBS) or sodium dodecyl sulfate (SDS)), 1-pentanol as the oxidant, dopant and co-emulsifier, respectively. The polymerization was carried out at 0 oC and 25 °C. Fourier transform infrared spectroscopy (FTIR) and elemental analysis indicated that anionic surfactants were successfully incorporated into the PPy backbone. Incorporation of anionic surfactants caused enhanced electrical conductivity, increased yield, decreased the size of particles as well as improved the thermal stability of the resultant PPy. The presence of anionic surfactant seems to inhibit undesirable side reactions so as to improve the regularity of the PPy backbone. Globular PPy particles were obtained with diameter ranged from 40 to 118 nm as revealed by field emission scanning electron microscopy (FE-SEM) and conductivity of 7.89×10-4 -2.35×10-2 S cm-1, as measured using impedance analyzer. It was found that polymerization at low temperature (0 oC) produced PPy particles with smaller size and higher conductivity. The sodium dodecyl sulfate-doped PPy (SDS-doped PPy) exhibited higher conductivity than that of the sodium dodecylbenzenesulfonate-doped PPy (NaDBS-doped PPy), due to the bulkiness of NaDBS as compared to SDS.

Original languageEnglish
Pages (from-to)459-472
Number of pages14
JournalPertanika Journal of Science and Technology
Volume21
Issue number2
Publication statusPublished - 2013

Fingerprint

Electric Conductivity
Anionic surfactants
Emulsion polymerization
Polypyrroles
nanoparticles
emulsion
Emulsions
polymerization
Surface-Active Agents
Polymerization
Nanoparticles
electrical conductivity
emulsions
surfactant
sodium dodecylbenzenesulfonate
sodium dodecyl sulfate
sodium
sulfate
conductivity
ferric sulfate

Keywords

  • Conducting polymer
  • Conjugated polymer
  • Emulsion polymerization
  • Polymer nanoparticle

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Chemical Engineering(all)
  • Computer Science(all)
  • Environmental Science(all)

Cite this

Electrical conductivity of anionic surfactant-doped polypyrrole nanoparticles prepared via emulsion polymerization. / Ghalib, H.; Abdullah, I.; Daik, Rusli.

In: Pertanika Journal of Science and Technology, Vol. 21, No. 2, 2013, p. 459-472.

Research output: Contribution to journalArticle

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