Electrorheological properties of polyaniline/K-feldspar conducting composite


EROL Ö., Karakisla M., ÜNAL H. İ., SAÇAK M.

JOURNAL OF COMPOSITE MATERIALS, cilt.46, sa.11, ss.1295-1304, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46 Sayı: 11
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1177/0021998311417649
  • Dergi Adı: JOURNAL OF COMPOSITE MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1295-1304
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, synthesis of conducting polyaniline (PAn)/potassium-feldspar (K-feldspar) composites, having various amounts of PAn, was carried out using (NH4)(2)S2O8 as oxidizing agent. The conducting composites were characterized by a series of techniques namely: Fourier transform-infrared, X-ray diffraction, scanning electron microscopy, thermogravimetry analysis, two-probe conductivity, magnetic susceptibility, and particle size measurements. For electrorheological (ER) measurements, the conductivities of the composites were reduced by a dedoping process. A series of suspensions were prepared in silicone oil, having various volume fractions, and then subjected to colloidal stability, flow rate, ER and creep-recovery tests. Enhancement in the electric field-induced viscosities and shear thinning non-Newtonian viscoelastic behavior was observed for all the composite materials studied. Recoverable viscoelastic deformations were detected from the creep and creep-recovery tests under externally applied electric field thus; they were classified as smart materials.