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Preparation and characterization of polypyrrole/modified multiwalled carbon nanotube nanocomposites polymerized in situ in the presence of barium titanate
Author(s) -
Moniruzzaman M.,
Sahoo S.,
Ghosh D.,
Das C. K.,
Singh R.
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38202
Subject(s) - materials science , barium titanate , nanocomposite , polypyrrole , composite material , fourier transform infrared spectroscopy , carbon nanotube , horizontal scan rate , polymerization , scanning electron microscope , nanotube , in situ polymerization , chemical engineering , cyclic voltammetry , electrochemistry , polymer , electrode , ceramic , chemistry , engineering
Polypyrrole (PPy) composites were prepared with both unmodified and amine‐modified multiwalled carbon nanotubes (MWCNTs) in the presence and absence of barium titanate (BaTiO 3 ) by in situ oxidative polymerization. A uniform coating of PPy on the MWCNTs and BaTiO 3 surfaces was confirmed by field emission scanning electron microscopy and high‐resolution transmission electron microscopy images. The structure of the pure and amine‐modified MWCNTs were identified by Fourier transform infrared spectroscopy. The incorporation of BaTiO 3 enhanced the thermal stability and capacitance properties of the composites. The maximum specific capacitance and energy density values found for the PPy/amine‐modified MWCNT/BaTiO 3 composites were 155.5 F/g and 21.6 W h/kg, respectively, at a scan rate of 10 mV/s. The maximum power density was found to be 385.7 W/kg for the same composite at a scan rate of 200 mV/s. Furthermore, the impedance spectra of the composites showed moderate capacitive behavior. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013