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Synthesis and characterization of polyaniline/carbon nanotube composites
Author(s) -
Ghatak S.,
Chakraborty G.,
Meikap A. K.,
Woods T.,
Babu R.,
Blau W. J.
Publication year - 2010
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.31962
Subject(s) - polyaniline , carbon nanotube , materials science , thermogravimetric analysis , composite material , thermal stability , composite number , fourier transform infrared spectroscopy , scanning electron microscope , conductive polymer , in situ polymerization , variable range hopping , photoluminescence , nanotube , polymerization , polymer , chemical engineering , thermal conduction , optoelectronics , engineering
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. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011