Characterization and corrosion protection properties of polypyrrole / montmorillonite electropolymerized onto aluminium alloy 1100

Castagno, K. R. L.; Dalmoro, Viviane; Mauler, Raquel Santos; Azambuja, Denise Schermann

doi:10.1007/s10965-009-9353-0

Cited by 29 publications

(11 citation statements)

References 30 publications

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“…(Kobayashi et al 1984;Castagno et al 2010) The CPE may be related to a capacitor if n = 1, or a resistor if n = 0. When n = 0.5, the charge transport may be associated with a diffusion process.…”

Section: Resultsmentioning

confidence: 99%

Structure and properties of conducting bacterial cellulose-polyaniline nanocomposites

Marins¹,

Soares²,

Dahmouche³

et al. 2011

Cellulose

123

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Conducting composite membranes of bacterial cellulose (BC) and polyaniline doped with dodecylbenzene sulfonic acid (PAni.DBSA) were successfully prepared by the in situ chemical polymerization of aniline in the presence of hydrated BC sheets. The polymerization was performed with ammonium peroxydisulfate as the oxidant agent and different amounts of DBSA. The composites were characterized by X-ray diffraction, attenuation reflectance Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), impedance spectroscopy and small angle X ray scattering (SAXS). The highest electrical conductivity value was achieved by using a DBSA/aniline molar ratio of 1.5 because this condition provided a better penetration of PAni.DBSA chains inside the hydrated BC sheet, as observed by SEM. The in situ polymerization gives rise to conducting membranes with the surface constituted by different degree roughness as indicated by Nyquist plots obtained from impedance spectroscopy and confirmed by SAXS measurements. This preliminary work provides a new way to prepare cellulose-polyaniline conducting membranes which find potential applications as electronic devices, sensors, intelligent clothes, etc.

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Section: Resultsmentioning

confidence: 99%

Structure and properties of conducting bacterial cellulose-polyaniline nanocomposites

Marins¹,

Soares²,

Dahmouche³

et al. 2011

Cellulose

123

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“…It is known that MMT plays as a good barrier to prevent corrosive species due to the layer structure [8,9,[19][20][21][22]. So MMT will have the same effects for all the samples.…”

Section: Change Of Ocpmentioning

confidence: 99%

“…As a result, corrosion rate decreases. In addition, MMT played a role as a barrier to prevent the corrosive species from steel [8,9,[19][20][21][22]. Consequently, metal should be protected with two effects at the same time, say anion inhibitor and barrier.…”

Section: Change Of Ocpmentioning

confidence: 99%

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Double corrosion protection mechanism of molybdate-doped polypyrrole/montmorillonite nanocomposites

Trung¹,

Hoan²,

Phung³

et al. 2012

Journal of Experimental Nanoscience

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Nanocomposites based on polypyrrole (PPy) doped with molybdate (PPy(MoO 4 )) and montmorillonite (MMT) were prepared by chemical polymerisation. The morphology of nanocomposite particles was studied by scanning electron microscopy. The chemical structure of conducting polymers (CPs) in nanocomposites was characterised by Raman spectroscopy. The thermal analysis showed that all CPs in the nanocomposites were stable for more than 500 C. Energy diffraction X-ray showed that the amount of Mo in element the PPy(MoO 4 )/MMT nanocomposite was 5.55%. The corrosion protection mechanism of the nanocomposites was investigated by electrochemical methods, showing that MMT acted as a barrier layer in nanocomposite and molybdate as an inhibitor for corrosion protection of metal.

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“…Conductive polypyrrole has been widely investigated due to its good thermal and electrical conductivity and environmental stability, as well as its various technological applications in corrosion protection and electrocatalysis [1][2][3][4][5][6]. The nature of the working electrode substrate in the preparation of polypyrrole film is very important because the properties of this film are dependent on the working electrode material.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis of Methanol Oxidation on Polypyrrole Electropolymerized on Aluminum Alloy 1100

et al. 2011

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In this paper, electrochemical evidences of the stability and catalytical ability of polypyrrole-modified (PPy) electrode formed on aluminum alloy 1100 for methanol electrooxidation are presented. The PPy films were synthesized potentiostatically with different charges. Cyclic voltammetry showed that the electrochemical window for a PPy-modified electrode started at −1.0 V (saturated calomel electrode, SCE) and finished at 1.80 V (SCE) in aqueous 0.10 mol L −1 of KClO 4 . This large potential range, not usual in aqueous medium, was important during the electrooxidation studies of methanol in order to determine the best potential for methanol electrooxidation. The chemical and physical stability of the film was evident during the process. Electrochemical methods were conclusive in showing that the adsorbed species formed on the electrode surface during the electrooxidation process do not inhibit the catalytical activity of the film.

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Characterization and corrosion protection properties of polypyrrole / montmorillonite electropolymerized onto aluminium alloy 1100

Cited by 29 publications

References 30 publications

Structure and properties of conducting bacterial cellulose-polyaniline nanocomposites

Structure and properties of conducting bacterial cellulose-polyaniline nanocomposites

Double corrosion protection mechanism of molybdate-doped polypyrrole/montmorillonite nanocomposites

Electrocatalysis of Methanol Oxidation on Polypyrrole Electropolymerized on Aluminum Alloy 1100

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