Morphological and electrical characteristics of polyaniline nanofibers

King, Roch Chan Yu; Roussel, Frédérick

doi:10.1016/j.synthmet.2005.07.268

Cited by 26 publications

(14 citation statements)

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“…[4][5][6] In recent years, one-dimensional PANI nanostructures, including nanowires, nanorods and nanotubes, have been studied. [7][8][9] Nowadays, conducting PANI/metal oxide nanocomposites have also attracted attention. 10 The properties of these nanocomposites are quite different from pristine PANI due to interfacial interactions between metal oxide nanoparticles and PANI macromolecules.…”

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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“…PAni‐nanofibers were synthesized according to the interfacial polymerization method previously described in the literature . A 5.48 mmol amount of aniline was dissolved in 50 mL toluene.…”

Section: Methodsmentioning

confidence: 99%

Polyaniline nanofibers for In situ MAO‐catalyzed polymerization of ethylene

Basso

Oliveira

Graebin

et al. 2014

J of Applied Polymer Sci

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In this work electro‐conductive polyaniline nanofibers (PAni‐nanofibers) were prepared via interfacial methodology. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations revealed that the synthesized PAni‐nanofibers present high aspect ratio with an average diameter of 80 nm, while they exhibit high conductivity (DC conductivity values: 4.19 ± 0.21 S cm−1). After specific treatment to remove moisture and remaining trapped HCl from PAni‐nanofibers, it was possible to prepare promising polyethylene (PE)/PAni composites by in situ polymerization of ethylene using bis(cyclopentadienyl) zirconium(IV) dichloride (Cp2ZrCl2) and methylaluminoxane (MAO) as catalytic system. More precisely, various contents of PAni‐nanofibers (from 0.2 to 7 wt %) were successfully incorporated in the in situ produced PE/PAni nanocomposites. PAni‐nanofibers were found to affect significantly the crystallization of the polyolefinic matrix while preserving its thermal stability. Preliminary measurements of electric properties showed PAni‐nanofibres are able to bring electro‐conductive properties to the in situ polymerized PE/PAni composites. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41197.

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“…the formation of undesirable aggregated structures after removal of the templates. PANI-NFs were also synthesized using SWCNTs [53], chlorophyllin nanorods [54], and composite nanofibers of methyl orange/ferric chloride (FeCl 3 ) [55], as nanostructured seed templates. The general shape of the seed (nanofibers vs. nanospheres) controls the overall morphology of the resulting precipitate, while differences in the length, diameter, etc., of the nanostructured seed templates do not have a significant impact.…”

Section: Hard (Physical) Template Methodsmentioning

confidence: 99%

“…The shape and size of the nanofibers does not appear to be affected by the solvent. PANI-NFs were prepared by an interfacial method in the presence of HCl [135,[143][144][145][146][147][148][149][150], HCl and SDS [151], HClO 4 [152][153][154], CSA [53], poly(styrenesulfonic acid) (PSSA) [155,156], DL-tartaric acid [157], DBSA [158], p-TSA [159], cerium(IV) oxide nanoparticles [160], and magnesium carbonate particles [161]. is preferred due to safety considerations, since the water layer seals the organic vapor within the reaction vessel.…”

Section: Template-free Methodsmentioning

confidence: 99%

Polyaniline Nanostructures

Ćirić‐Marjanović

2010

Nanostructured Conductive Polymers

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Polyaniline (PANI) is one of the most extensively studied conducting polymers because of its simple synthesis [1] and doping/dedoping chemistry [2], low cost, high conductivity, and excellent environmental stability. PANI has a wide applicability in rechargeable batteries [3], erasable optical information storage [4], shielding of electromagnetic interference [5], microwave-and radar-absorbing materials [6], sensors [7], indicators [8], catalysts [9], electronic and bioelectronic components [10], membranes [11], electrochemical capacitors [12], electrochromic devices [13], nonlinear optical [14] and light-emitting devices [15], electromechanical actuators [16], antistatic [17] and anticorrosion coatings [18]. Its electromagnetic and optical properties depend mostly on its oxidation state and degree of protonation [19]. The green emeraldine salt form of PANI is conducting ($1-10 S cm À1 for granular powders) [1]. It contains, depending on the synthetic route, variousunits (in the preceeding formulae B, Q and A À denote a benzenoid ring, quinonoid ring and dopant anion, respectively). The blue emer-The preparation of bulk quantities of conducting granular PANI is usually performed Nanostructured Conductive PolymersEdited by Ali Eftekhari by the oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in an acidic aqueous solution (initial pH < 2.0) [1]. Colloidal PANI nanoparticles are prepared by dispersion polymerization of aniline in the presence of various colloidal stabilizers [20,21]. The average size of colloidal PANI nanoparticles decreases with increasing stabilizer/aniline ratio. PANI colloids often have nonspherical (rice grain, needle-like, etc.) core-shell morphology. The colloidal nanoparticle core most likely has a composite nature, i.e. it is composed of both the PANI and the incorporated stabilizer, while the shell is formed by the stabilizer. Nowadays, conducting PANI nanostructures are the focus of intense research owing to their significantly enhanced dispersibility and processability, and substantially improved performance in many applications, in comparison with granular and colloidal PANI [22][23][24][25][26][27]. The continuously growing interest in the study of zero-dimensional (0-D) (solid nanospheres), one-dimensional (1-D) (nanofibers (nanowires), nanorods (nanosticks), nanoneedles, rice-like nanostructures, nanotubes), two-dimensional (2-D) (nanoribbons (nanobelts), nanosheets (nanoplates, nanoflakes, nanodisks, leaf-like nanostructures), nanorings (cyclic nanostructures), net-like nanostructures), and three-dimensional (3-D) PANI nanostructures (hollow nanospheres, dendritic and polyhedral nanoparticles, flower-like, rhizoid-like, brain-like, urchin-like, and star-like nanostructures, etc.) has dramatically increased in recent years (Figure 2.1). The major focus of research has been the preparation, characterization, processing, and application of PANI nanofibers (PANI-NFs) and nanotubes (PANI-NTs). PANI-NFs are 1-D PANI nanoobjects of cylindrical profile with diameters ...

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Morphological and electrical characteristics of polyaniline nanofibers

Cited by 26 publications

References 14 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

Polyaniline nanofibers for In situ MAO‐catalyzed polymerization of ethylene

Polyaniline Nanostructures

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