Preparation and characterization of conductive polypyrrole/kaolinite composites

Acar H., KARAKIŞLA M., SAÇAK M.

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, cilt.16, sa.3, ss.845-850, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 16 Sayı: 3
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.mssp.2013.01.009
  • Dergi Adı: MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.845-850
  • Anahtar Kelimeler: Kaolinite, Polypyrrole, Conductive composite, Microhardness, Sensor, INVERTED EMULSION PATHWAY, HYBRID MATERIALS, CLAY, NANOCOMPOSITE, NANOPARTICLES, DEGRADATION, POLYANILINE, POLYMERS
  • Ankara Üniversitesi Adresli: Evet

Özet

Conductive polypyrrole (PPy)/kaolinite clay composites were prepared by in situ chemical polymerization of pyrrole in the presence of kaolinite using FeCl3 as oxidant. The PPy content and conductivity of the composites reached 32.8% and 8.3 x 10(-2) S/cm at HCl concentrations of 1.5 M and 0.5 M, respectively. The microhardness of the composites containing different amounts of PPy was higher than that of the PPy and kaolinite components. The highest microhardness observed was 30.17 kg/mm(2) for the composite containing 9.6% PPy. The electrical resistance of the composites was monitored during heating cooling cycles over the range 5-120 degrees C. The change in resistance with temperature was more repeatable for, the composite than for PPy. The composites were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The humidity-sensing properties were also examined. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.