Abstract
The synthesis of polyaniline (PANI) containing different carbon nanotubes (CNTs) by in situ polymerization is reported in this study. The samples were characterized by X-ray diffraction and scanning electron microscopy. Fourier transform infrared and ultraviolet-visible spectroscopy were used to determine the change in structure of the polymer/CNT composites. Thermogravimetric analysis showed that the composites had better thermal stability than the pure PANI. Photoluminescence spectra showed a blueshift in the PANI-single-walled nanotube (SWNT) composite. Low-temperature (77-300 K) electrical transport properties were measured in the absence and presence of a magnetic field up to 1 T. Direct-current conductivity exhibited a nonohmic, three-dimensional variable range hopping mechanism. The room-temperature magnetoconductivity of all of the investigated samples except the PANI-SWNT composite were negative; however, it was positive for the PANI-SWNT composite, and its magnitude decreased with increasing temperature.
Original language | English |
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Pages (from-to) | 1016-1025 |
Number of pages | 10 |
Journal | Journal of Applied Polymer Science |
Volume | 119 |
Issue number | 2 |
DOIs | |
State | Published - 15 Jan 2011 |
Externally published | Yes |
Keywords
- charge transport
- conducting polymers
- nanocomposites