Structural and conductivity changes during the pyrolysis of polyaniline base

Trchová, Miroslava; Matějka, Pavel; Brodinová, Jitka; Kalendová, Andréa; Prokeš, Ján; Stejskal, Jaroslav

doi:10.1016/j.polymdegradstab.2005.04.022

Cited by 126 publications

(66 citation statements)

References 33 publications

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“…The spectra are shown in Figure 3 and their band assignments are listed in Table 1. The infrared spectrum of the as-synthesized emeraldine salt is similar to that obtained by other authors [24,[30][31][32][33][34]. The characteristic infrared bands at about 1615 cm −1 and 1494 cm −1 are assigned to the quinoid and benzenoid stretching vibrations, respectively.…”

Section: Ft-ir Spectroscopysupporting

confidence: 84%

“…Generally a three-step decomposition process has been observed for the emeraldine salt [9,19]. In this process the initial stage of weight loss is due to the volatilization of water molecules; then at higher temperatures the protonic acid component of the polymer is lost and finally at more extreme temperatures the degradation of the polymer can lead to production of gases such as acetylene and ammonia or amorphous carbon [19,24].…”

Section: Journal Of Chemistrymentioning

confidence: 99%

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Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Gul

Shah

Bilal

2015

Journal of Chemistry

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A comprehensive study of thermally treated polyaniline in its emeraldine salt form is presented here. It offers an understanding of the thermal stability of the polymer. Emeraldine salt was prepared by a novel emulsion polymerization pathway using dodecylbenzene sulfonic acid and sulfuric acid together as dopants. The effect of temperature and heating rate on the degradation of this emeraldine salt was studied via thermogravimetric analysis. The thermally analyzed sample was collected at various temperatures, that is, 250, 490, 500, and 1000 ∘ C. The gradual changes in the structure of the emeraldine salt were followed through cyclic voltammetry, Fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy. Results demonstrate that emeraldine salt shows high thermal stability up to 500 ∘ C. This is much higher working temperature for the use of emeraldine salt in higher temperature applications. Further heat treatment seems to induce deprotonation in emeraldine salt. Cyclic voltammetry and ultraviolet-visible spectroscopy revealed that complete deprotonation takes place at 1000 ∘ C where it loses its electrical conductivity. It is interesting to note that after the elimination of the dopants, the basic backbone of emeraldine salt was not destroyed. The results reveal that the dopants employed have a stability effect on the skeleton of emeraldine salt.

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Section: Ft-ir Spectroscopysupporting

confidence: 84%

Section: Journal Of Chemistrymentioning

confidence: 99%

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Gul

Shah

Bilal

2015

Journal of Chemistry

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“…All of NTHCs have two broad peaks at~23.5°and~43.5°, corresponding to (002) and (101) planes, which are characteristic of amorphous carbon materials. It is worth noting that the position of the (002) peak slightly shifts to low angles as the carbonization temperature increases, which indicates the layer distance increases with increasing the pyrolysis temperature [41,42]. Moreover, according to the Bragg equation, the layer distances of NTHC-1050, -1150, -1250 in the position of the (002) plane are calculated to be 0.376, 0.383 and 0.386 nm, respectively.…”

Section: Resultsmentioning

confidence: 92%

Nanotube-like hard carbon as high-performance anode material for sodium ion hybrid capacitors

et al. 2017

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Sodium ion hybrid capacitors (SIHCs) are of great concern in large-scale energy storage applications due to their good energy-and-power characteristic, as well as abundant reserves and low cost of sodium. However, the sluggish faradaic kinetics of anode materials severely limit the overall electrochemical performance of SIHC devices. Herein, we report an application of nanotube-like hard carbon (NTHC) anode material prepared by high-temperature carbonization (1150°C) of polyaniline (PANI) nanotubes for high-performance SIHCs. As a result, the assembled sodium ion half-cell with NTHC shows a high reversible capacity of 419.5 mA h g . Within the potential range of 1.5-3.5 V, the SIHCs display an outstanding cycling stability tested at 2 A g −1 with a good capacity retention of 82.5% even after 12,000 cycles.

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“…Organic-inorganic composites containing inorganic nanoparticle fillers exhibit both improved electrical and mechanical properties. Inorganic nanoparticles in the composites are coated with a conductive polymer layer, which improves the physical properties of the material [18]. The potential of using polyaniline in inorganic paints as an anti-corrosion agent is the subject of extensive studies.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosion Properties of Perovskites Surface-Modified With Conducting Polymers in Alkyde Coatings

Hájková¹,

Kalendová²,

Hejdová³

2014

Acta Metall Slovaca

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The effect of pigment particle surface treatment with polyaniline and polypyrrole on the corrosion inhibiting properties of organic paints was investigated. Mixed oxides possessing the spinel and perovskite structures were synthesised for the study. Coatings based on an alkyde resin were prepared for the investigation of the corrosion protection properties of the pigments, the surfaces of which had been provided with a polyaniline and polypyrrole layers. Laboratory corrosion tests were applied to the paint films. Polyaniline phosphate was found preferable to polypyrrole as the modifying agent of the pigment surface regarding the pigment's corrosion inhibiting efficiency.

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Structural and conductivity changes during the pyrolysis of polyaniline base

Cited by 126 publications

References 33 publications

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Nanotube-like hard carbon as high-performance anode material for sodium ion hybrid capacitors

Anticorrosion Properties of Perovskites Surface-Modified With Conducting Polymers in Alkyde Coatings

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