Morphology and conductivity of polyaniline nanofibers prepared by ‘seeding’ polymerization

Xing, Shengtao; Zhao, Chun; Jing, Shengyu; Wang, Zichen

doi:10.1016/j.polymer.2006.02.008

Cited by 133 publications

(83 citation statements)

References 24 publications

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“…In addition, it is easy to prepare and has excellent environmental stability. [1][2][3] PANI can be used in electrochromic devices, light-emitting diodes, electrostatic discharge protection, etc. [4][5][6] In recent years, one-dimensional PANI nanostructures, including nanowires, nanorods and nanotubes, have been studied.…”

Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

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The polyaniline/copper oxide (PANI/CuO) nanocomposite was prepared by mixing solutions of polyaniline and copper oxide nanoparticles in dimethyl sulfoxide (DMSO). The synthesized polymer nanocomposites were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-visible spectroscopy. The characteristic peaks in XRD and UVvisible spectra confirmed the presence of CuO in the polymer structure. SEM images indicated morphological changes in the composite matrix as compared to the pristine PANI. The DC conductivity measurements were performed using two-probe method for various temperatures. AC conductivity and dielectric response of the composites were investigated in the frequency range of 10 2 -10 6 Hz using LCR meter. Dielectric permittivity 0 ðwÞ and dielectric loss factor 00 ðwÞ were investigated. It was observed that 0 ðwÞ and 00 ðwÞ decrease with increase in frequency at all temperatures. At a particular frequency it is observed that both 0 ðwÞ and 00 ðwÞ increase with increase in temperature. It was also observed that AC conductivity increased with increase in frequency and temperature.

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Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

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“…The available literature revealed different methods to synthesize PANi including electrochemical ), template , enzymatic (Kobayashi et al 2001), plasma (Nastase et al 2005), photo (Kobayashi et al 1998), subdivision of chemical polymerization into heterophase (Vidotto et al 1969), solution (Kuramoto and Tomita 1997), interfacial (Dallas et al 2007), seeding (Xing et al 2006), metathesis (Zhang et al 2009), selfassembling (Bahgat et al 2003) and sonochemical polymerizations.…”

Section: Introductionmentioning

confidence: 99%

Facile and novel route for preparation of nanostructured polyaniline (PANi) thin films

et al. 2012

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Simple and inexpensive single step facile novel chemical route for the preparation of polyaniline (PANi) nanofibers has been reported. These PANi nanofibers are characterized with X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM). Polyaniline nanofibers exhibit amorphous nature as confirmed from XRD and SAED study. Based on FESEM and TEM analysis, the formation of the polyaniline nanofibers with average diameter of about 40 nm was inferred. The presence of characteristic bonds of polyaniline was observed from FTIR spectroscopy technique. Electrical and optical properties revealed that p-type conductivity PANi with room temperature conductivity of 2.77 9 10 -5 (X cm) -1 has band gap of 3.40 eV. A blue shift of 0.86 eV with characteristic absorption peak at 441 nm has been attributed due to quantized size of polyaniline nanofibers.

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“…In the recent years, several techniques for synthesizing PANI nanostructures have been developed including template synthesis, 26 template-free synthesis, 27 seeding polymerization, 28,29 interfacial polymerization, [30][31][32] rapid mixing polymerization, 33 electrospinning, 34 and electrochemical polymerization. 35,36 Template method introduces ''structural directors'' in the polymerization bath that dictates the PANI nanostructures morphology.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of dendritic polyaniline nanofibers by using soft template of sodium alginate

Bhowmick

Bain

Maity

et al. 2011

J of Applied Polymer Sci

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Highly crystallized polyaniline (PANI) nanofibers were synthesized by oxidative polymerization of aniline in the presence of sodium alginate as a soft template in HCl and ammonium peroxydisulfate (APS) acting as an oxidizing agent. Sodium alginate, in presence of a protonic acid like HCl, formed hydrogen bonds with anilium ions or oligomers. The formed hydrogen bonds provide the driving force to form PANI nanofibers. The nanofibers were separated from the alginate gel by degelling with ammonium hydroxide and during degelling emeraldine salt was converted into emeraldine base form. The polymerized PANI was characterized using ultraviolet (UV)-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). UV and FTIR spectra showed that the presence of sodium alginate had no effect on the electronic state and backbone structures of the resulting PANI products. It was evident from the XRD analysis that the obtained PANI nanofibers exhibit higher crystalline order. SEM micrographs showed that PANI nanofibers were just like a mat of interwoven twisted nanofibers. After magnification of the SEM image, it was found that most of the nanofibers were interconnected to form ramose structures rather than isolated nanofibers.

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Morphology and conductivity of polyaniline nanofibers prepared by ‘seeding’ polymerization

Cited by 133 publications

References 24 publications

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Facile and novel route for preparation of nanostructured polyaniline (PANi) thin films

Synthesis of dendritic polyaniline nanofibers by using soft template of sodium alginate

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