Synthesis, characterization, and properties of monodispersed magnetite coated multi‐walled carbon nanotube/polypyrrole nanocomposites synthesized by in‐situ chemical oxidative polymerization

Abstract

This study describes the preparation of a nanocomposites fabricated from monodispersed 4‐nm iron oxide (Fe3O4) coated on the surface of carboxylic acid containing multi‐walled carbon nanotube (c‐MWCNT) and polypyrrole (PPy) by in situ chemical oxidative polymerization. High‐resolution transmission electron microscopy images and X‐ray diffraction (XRD) data indicate that the resulting Fe3O4 nanoparticles synthesized using the thermal decomposition are close to spherical dots with a particle size about 4 ± 0.2 nm. The resulting nanoparticles were further mixed with c‐MWCNT in an aqueous solution containing with anionic surfactant sodium bis(2‐ethylhexyl) sulfosuccinate to form one‐dimensional Fe3O4 coated c‐MWCNT template for further preparation of nanocomposite. Structural and morphological analysis using field‐emission scanning electron microscopy, high‐resolution transmission electron microscopy, and XRD showed that the fabricated Fe3O4 coated c‐MWCNT/PPy nanocomposites are one‐dimensional core (Fe3O4 coated c‐MWCNT)‐shell (PPy) structures. The conductivities of these Fe3O4 coated c‐MWCNT/PPy nanocomposites are about four times higher than those of pure PPy matrix. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 727–733, 2008

Synthesis and characterization of water‐dispersible, superparamagnetic single‐wall carbon nanotubes decorated with iron oxide nanoparticles and well‐defined chelating diblock copolymers

“…The latter is probably accredited to the presence of a thin layer of amorphous polymeric material onto the iron oxide nanoparticles decorating the SWCNT surfaces, combined with the low magnetic content within the composite. Similar observations were reported by Wu et al for a magnetic nanocomposite consisting of MWCNT decorated with Fe 3 O 4 and stabilized by a layer of PPy 27…”

“…This value is higher than the Ms reported for similar systems. For example, the Ms for a nanocomposite consisting of MWCNTs, polypyrrole and magnetite, presenting a ferromagnetic behavior was found to be at ∼0.03 emu/g 27. Moreover, Feng et al who have synthesized magneto‐active MWCNTs having poly ( L ‐lactic acid) covalently attached onto their surfaces, have reported very low Ms values at ∼0.08 emu/g and superparamagnetic behavior 37…”

“…Moreover, in the work reported by Zhang et al, polymer/MWCNTs/Fe 3 O 4 composites were prepared in which the pristine MWCNTs (nonoxidized) were functionalized with poly(ethyleneimine) based on noncovalent bond interactions 26. Furthermore, polymer/MWCNT/Fe 3 O 4 composites have been prepared using a polypyrole (PPy) homopolymer as the stabilizing agent 27…”

Polypyrrole/Fe3O4/CNT as a recyclable and highly efficient catalyst for one‐pot three‐component synthesis of pyran derivatives

“…Furthermore, the thermogeravimetric analysis of PPY/Fe 3 O 4 /CNT was shown a satisfactory thermal stability for this magnetic nanocomposite . It was also shown that the conductivity of this nanocomposite is more than pure polypyrrole matrix …”

Fabrication of graphene nanosheet (GNS)–Fe3O4 hybrids and GNS–Fe3O4/syndiotactic polystyrene composites with high dielectric permittivity

“…As far as graphene-based composites are concerned, since magnetic graphene is not only magnetic but also conductive, it should be an attractive candidate to be used as nanofiller for the preparation of processable polymeric composites. Such composites may possess good magnetic, electrical, and dielectric performance, showing great potentials in the fields of electromagnetic interference (EMI) shielding, electro-chromic device, energy storage, and microwave absorption [1][2][3][4][5][6][7]. More recently, several papers related to magnetic graphene (or magnetic GO)/polymer composites have been reported.…”