A study of the optical, electrical and structural properties of poly(pyrrole-3,4-dicarboxylic acid)

Mizera, Adam; Grabowski, Sławomir J.; Ławniczak, Paweł; Wysocka‐Żołopa, Monika; Dubis, Alina T.; Łapiński, Andrzej

doi:10.1016/j.polymer.2018.12.056

Cited by 10 publications

(3 citation statements)

References 74 publications

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“…It was observed that greater delocalization occurs for the longer polyconjugate system. [87][88][89] The presence of two different polypyrrole structures in the deposit precipitated from the toluene solution containing pyrrole and ox-MWCNTs is also confirmed by the results of the thermogravimetric analysis (TGA). The curves of the relative mass versus temperature for the obtained composite are shown in Figure 6.…”

Section: Composites Of Ox-mwcnts and Polypyrrolementioning

confidence: 59%

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Oxidized MWCNTs as an Oxidizing Agent and Dopant in MWCNT@Polypyrrole Composite Formation**

et al. 2021

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A new approach to the formation of composites of carbon nanotubes and polypyrrole (PPy) is proposed. Oxidized multi‐walled carbon nanotubes (ox‐MWCNTs) are used as oxidation agents in pyrrole polymerization. The polymeric phase is deposited both at the surface of the carbon nanotube to form a core‐shell structure and in the empty spaces of the MWCNT network. Each form of the polypyrrole phase exhibits different electrochemical properties. PPy deposited directly at the carbon nanotube surface as a uniform and dense layer is oxidized at less positive potentials, compared to the polymeric material deposited in the pores of the nanotube network. MWCNTs with anions incorporated into structural defects formed during their oxidation in a piranha solution also act as dopants of the oxidized form of PPy. The polymeric film deposited directly at the ox‐MWCNT surface is in its oxidized state. The redox processes involving this part of the PPy film are accompanied by the transport of cations of the supporting electrolyte. The charge transfer between ox‐MWCNTs and the deposited PPy film is confirmed by the results of the theoretical calculations of the energy states at the carbon nanotube and polypyrrole interface. A neutral PPy film located in layers remote from the surface of the nanotube is oxidized at more positive potentials. The oxidation of PPy located in the pores of the ox‐MWCNT network results in a broad voltammetric peak formation.

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Section: Composites Of Ox-mwcnts and Polypyrrolementioning

confidence: 59%

“…The position of this band is influenced by the substituent connected to the pyrrole ring and the length of the PPy chains. It was observed that greater delocalization occurs for the longer polyconjugate system [87–89] …”

Section: Resultsmentioning

confidence: 99%

Oxidized MWCNTs as an Oxidizing Agent and Dopant in MWCNT@Polypyrrole Composite Formation**

et al. 2021

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“…Nafion in the hydrated state shows high proton conductivity values ([10 S/ m), but its operating temperature range is below the boiling point of water. Additionally, Nafion is complicated to manufacture and relatively expensive, about 1700 $/m 2 (Bayer et al 2016;Liu et al 2018;Hernández-Flores et al 2016;Mizera et al 2019;Tiwari et al 2016;Wong et al 2019). In the search for new solid polymer electrolytes, an interesting approach is to modify natural polymers (Fujishima et al 2008;Hernández-Flores et al 2016;Jesuraj and Manimuthu 2018;Kalaiselvimary and Prabhu 2018;Kalaiselvimary et al 2019;Połomska et al 2010Połomska et al , 2011Yamada and Goto 2012;Yamada and Ogino 2015), including the most abundant polymer in nature and the main building material of plantscellulose.…”

Section: Introductionmentioning

confidence: 99%

New liquid-free proton conductive nanocomposite based on imidazole-functionalized cellulose nanofibers

et al. 2020

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The first successful attempt to synthesize a new proton conducting polymeric nanocomposite film based on pure cellulose nanofibers (CNF) as a polymer matrix functionalized on their surface with imidazole molecules (Im) as a dopant, was made. The 2CNF-Im nanomaterial contains on average one molecule of imidazole per 2 glucose units from cellulose chains. Water evaporation and thermal stability of 2CNF-Im were studied by thermogravimetric analysis (TGA and DTG) and differential scanning calorimetry (DSC). The temperature dependence of electrical conductivity was studied by the impedance spectroscopy. At 140 °C, the 2CNF-Im nanocomposite has a maximum conductivity of 7.0 × 10−3 S/m, i.e. four orders of magnitude higher than that of non-functionalized CNF matrix. The newly synthesized cellulose nanocomposite exhibits high electrical and thermal stability. In 2CNF-Im, the activation energy of the proton transport process is the lowest compared to the previously synthesized imidazole-functionalized composites based on other pure cellulose materials and equals 0.62 eV. The synthesized nanomaterial is liquid-free solid polymer electrolyte showing proton conductivity above the boiling point of water.

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Electrochemical determination of Pb2+ and Cd2+ with a poly(pyrrole-1-carboxylic acid) modified electrode

Poudel

Sunder

Rohanifar

et al. 2022

Journal of Electroanalytical Chemistry

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A study of the optical, electrical and structural properties of poly(pyrrole-3,4-dicarboxylic acid)

Cited by 10 publications

References 74 publications

Oxidized MWCNTs as an Oxidizing Agent and Dopant in MWCNT@Polypyrrole Composite Formation**

Oxidized MWCNTs as an Oxidizing Agent and Dopant in MWCNT@Polypyrrole Composite Formation**

New liquid-free proton conductive nanocomposite based on imidazole-functionalized cellulose nanofibers

Electrochemical determination of Pb2+ and Cd2+ with a poly(pyrrole-1-carboxylic acid) modified electrode

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