Synthesis of New Polyaniline/Nanotube Composites Using Ultrasonically Initiated Emulsion Polymerization

Abstract

Ultrasonically initiated, in situ emulsion polymerization was used to prepare multiwalled carbon nanotube/polyaniline composites (MWNTs/PANI). Transmission electron microscopy (TEM) showed that the nanotubes were coated with a PANI layer, with the thickness of this coating varying with the content of carbon nanotubes and polymerization conditions. Whereas polyaniline/carbon nanotube composite particles prepared by the conventional stirring method have a highly structured, nodular morphology, ultrasonic initiation leads to long, thin, polymer-wrapped tubes. In the case of ultrasonically initiated in situ emulsion polymerization, Fourier transform infrared (FTIR) spectra suggested that siteselective interactions between the quinoid ring of the PANI and the MWNTs facilitate charge-transfer between the two components. In such composites, CNT improved the polymer properties, such as thermal stability, as determined by thermogravimetric analysis and conductivity measured using the four-probe method.

Modification of glassy carbon electrode with polyaniline/multi-walled carbon nanotubes composite: Application to electro-reduction of bromate

“…The acid-treatment did not change the crystalline order of CNT. For PANI, the characteristic peaks appeared at 15.3°, 20.4°and 25.4°, corresponding to (0 1 1), (0 2 0) and (2 0 0) crystal planes of PANI [33,34]. The data indicates that no additional crystalline order has been introduced into the composite.…”

Electrical Conductivity Studies of Polyaniline Nanotubes Doped with Different Sulfonic Acids

“…Zhang et al have demonstrated that the polymeric acid has significant effect on the morphology and size of the polyaniline nanotubes [5]. Many techniques have been used to synthesize PANI nanostructure such as stirring [6][7][8], static placement, [9] sonication [10][11][12], and emulsion polymerization [13][14][15][16]. Particularly, conducting polymer nanotubes and nanofibers have received growing interest in recent years due to their unique properties and promising potential applications in nanodevices [17][18][19][20][21].…”

Environmentally Friendly Fabrication of Surface‐Modified MWNT‐Supported Pt Nanocomposites for PEMFCs

“…The shape and intensity of the C 1s, N 1s and O 1s spectra changed with increase in the treatment time, results that corresponded to the ratio of each atom in the wide spectra. The intensity of sp 2 peak at the [28,29]. The XPS C 1s and N 1s spectra indicated that oxide and nitride functional groups such as -CO, -NO and -NH 2 were fabricated on the MWNT surfaces by N 2 atmospheric pressure plasma treatment.…”