Thin film conductive polymers on aluminum surfaces: interfacial charge-transfer and anticorrosion aspects

Racicot, R. J.; Clark, Robert; Liu, H.-B.; Yang, Sze C.; Alias, M.N.; Brown, Richard D.

doi:10.1117/12.219550

Cited by 53 publications

(5 citation statements)

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“…Over the past two decades, conducting polymers and especially polyaniline (PANI) have been the object of intensive research. − Polyaniline is the generic term which describes the materials providing from oxidative polymerization of aniline. These materials can be used in supercapacitors, displays, − batteries, electromagnetic shielding, and microwave absorbing systems as well as for corrosion protection. − Conductivity of PANI depends on the degree of oxidation and of protonation of the polymeric backbone. It varies over 10 orders of magnitude when the half-oxidized form, i.e., emeraldine base (EB), is fully protonated, passing from ∼10 -8 S cm -1 , in the base form, to ∼10 2 S cm -1 , in the emeraldine salt (ES).…”

Section: Introductionmentioning

confidence: 99%

Vibrational Study of Short-Range Order and Structure of Polyaniline Bases and Salts

1999

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Raman and infrared reflection spectra in the backbone deformations and lattice modes range (10−1000 cm-1) of EB/ES-I and EB/ES-II polyanilines are discussed and compared with those of an oligomer (BQBBa) and of the constitutive bricks of the polyaniline skeleton: diphenylamine (BB), N,N‘-diphenyl-1,4-phenylenediamine (BBB), and N,N‘-diphenyl-1,4-phenylenediimine (BQB). Short-range structure, scaling motif, and disorder are discussed. Emphasis is given to the relationship between hybridization, short-range structure, disorder, and optical properties. Ring, CH deformations, and librational/translational modes appear very sensitive to the static and dynamic disorder. Results show that vibrational spectroscopy allows to distinguish the two classes of polyaniline (ES-I and ES-II), whatever the inserted anion. The sketch of a continuous change of angle between the rigid virtual N−ring−N bond is proposed to describe the static orientational disorder.

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Section: Introductionmentioning

confidence: 99%

Vibrational Study of Short-Range Order and Structure of Polyaniline Bases and Salts

1999

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“…Currently, the processability of many conducting polymers, including polyaniline, is poor [12][13][14]. However, in 2006, Artificial Muscle, Inc. launched the first commercial line of linear actuators based on conducting polymers [15].…”

Section: Conductive Polymers In Biomedical Applicationsmentioning

confidence: 99%

“…The chemical synthesis of polyaniline frequently involves free-radical polymerization, usually using an initiator such as ammonium The conductivity of polyaniline can be adjusted by incorporating it into compounds or doping it with a secondary agent. Polyaniline can easily be mixed with other types of polymers, which has led to its use in static-electric dissipating compounds and anti-corrosion coatings [14,17]. Specifically, it is hoped that electroactive polymers will enable low-cost electronic devices such as organic light-emitting diodes (OLEDs) and solar cells.…”

Section: Polyanilinementioning

confidence: 99%

“…This is defined as the straight-line distance between crosslinks and is calculated as (12) where is the root mean square distance of polymer chains between neighboring crosslinks. If the hydrogel swells isotropically, then (13) and the correlation distance can be written as (14) where is the Flory characteristic ratio and is the molecular weight of a repeat unit.…”

Section: H Gold and Gold Nanocompositesmentioning

confidence: 99%

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Synthesis of a directionally-conductive polyaniline hydrogel composite by vapor deposition.

Reed¹

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Electroactive polymers (EAPs), including conducting polymers (CPs) such as polyaniline (PAn), and hydrogels are exciting areas of research in disciplines such as biomedical engineering, with the goal of creating low-cost, lightweight, non-toxic artificial muscles with characteristics similar to natural muscle. Such a material could be used to create more natural prosthetic limbs or artificial heart muscle, which could be implanted in the left ventricle to assist patients with congestive heart failure. Currently, however, electroactive polymers are not a viable replacement for natural muscles for a variety of reasons, including insufficient applied force and lack of robustness [1]. Hydrogels suffer from many of the same limitations [2]. Electroactive polymers include conducting polymers (CPs) such as polyaniline (PAn), which has the general structure [(-B-NH-B-NH) y (-B-N=Q=N) 1-y ] x , where B is a C 6 H 4 ring in the benzene-like arrangement and Q is the same ring in the quinone-like arrangement. The 50% oxidized form, which is the most conductive, is termed emeraldine (y=0.5). Polyaniline is currently used in anti-corrosive coating and staticdissipating compounds, and has been proposed for use in electrochromic windows, flexible circuit boards, and conductive fabrics. Many research groups have developed methods for creating novel polyaniline structures and composites. However, the processibility of polyaniline is currently poor, and further work needs to be done before polyaniline or its composites can be considered viable artificial muscles [3]. This thesis describes a novel and exciting method for the creation of a patterned polyaniline-hydrogel composite which shows directional conductivity, a material which vi has not been reported in the literature as far as we are aware. This material could provide the foundation for a micro-or nano-patterned composite which would further the goals of developing a viable artificial muscle with a directed pattern of contraction. vii

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“…Diversos substitutos aos cromatos têm sido propostos desde a década de 1990, dentre eles compostos de cério, molibdênio e alguns compostos orgânicos [24,25,32]. Entretanto, a utilização da PAni se mostra bastante promissora desde que foi observado seu efeito protetor quando presente na forma de filmes sobre a superfície de aços inoxidáveis [33], um aço carbono [34], alumínio [35], cobre e prata [36]. [37,38] e permite que a PAni retorne ao seu estado de oxidação original ao reagir com o meio (reação de redução do oxigênio).…”

Section: Corrosão E Utilização Da Polianilina Em Seu Controleunclassified

Compósitos de polianilina e nanopartículas de magnetita eletropolimerizados sobre o aço AISI 1020: correlação entre variáveis operacionais, características eletroquímicas e propriedades anticorrosiva

Santos¹

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Title: Polyaniline-magnetite nanoparticles composites electropolymerized on the AISI 1020 steel: correlations among operational variables, electrochemical characteristics and anticorrosion properties The use of polyaniline (PAni) for corrosion protection is promising for environmental and industrial aspects. When PAni is applied as a composite film with nanostructures, an enhanced coating is obtained. In this case, composites with magnetite nanoparticles (Fe 3 O 4-np) are especially interesting because the Fe 3 O 4-np improve the electroactivity of PAni. The use of PAni composite films remains a challenge, nevertheless; there are blanks in the knowledge about the correlation among synthetic operational parameters, film characteristics and corrosion protection properties. In this study, PAni/Fe 3 O 4-np composites were synthesized on the surface of AISI 1020 xii 2.2.7 Determinação do teor de ferro nos filmes eletrossintetizados 2.3 Apresentação e interpretação dos resultados 2.3.1 Elaboração de gráficos e ilustrações 2.3.2 Identificação de bandas espectrais e picos voltamétricos 2.3.3 Determinação do tamanho das nanopartículas de magnetita 2.3.4 Análise das curvas de polarização potenciodinâmica Capítulo 3. Eletrossíntese e caracterização de filmes de polianilina sobre o aço carbono 3.1 Comportamento eletroquímico do aço AISI 1020 em solução de ácido oxálico e anilina 3.2 Eletropolimerização pelo método potenciostático 3.3 Caracterização dos filmes de PAni eletropolimerizados sobre o aço AISI 1020 3.3.1 Caracterização morfológica por microscopia eletrônica de varredura 3.3.2 Caracterização da estrutura química por espectroscopia na região do infravermelho 3.3.3 Caracterização da eletroatividade pela voltametria cíclica 3.4 Conclusões parciais Capítulo 4. Eletrossíntese e caracterização de filmes compósitos de polianilina e nanopartículas de magnetita sobre o aço carbono 4.1 Caracterização das nanopartículas de magnetita 4.2 Eletropolimerização de compósitos de PAni/Fe 3 O 4-np pelo método potenciostáticos 4.3 Caracterização dos compósitos de polianilina e nanopartículas de magnetita eletropolimerizados sobre o aço AISI 1020 4.3.1 Determinação do teor de ferro total nos filmes compósitos eletropolimerizados 4.3.2. Caracterização morfológica por microscopia eletrônica de varredura xiii 4.3.3 Caracterização da estrutura química por espectroscopia na região do infravermelho 4.3.4 Caracterização da eletroatividade pela voltametria cíclica 4.4 Efeito da concentração das nanopartículas de magnetita na solução precursora 4.5 Conclusões parciais Capítulo 5. Propriedades de proteção contra a corrosão dos recobrimentos de polianilina e compósitos de polianilina e nanopartículas de magnetita eletrossintetizados sobre o aço AISI 1020 5.1 Proteção contra a corrosão do aço AISI 1020 por recobrimentos de PAni eletropolimerizados em diferentes condições 5.1.1 Perfis de potencial de circuito aberto 5.1.2 Curvas de polarização potenciodinâmica 5.2 Proteção contra a corrosão do aço AISI 1020 por recobrimentos compósitos de polianilin...

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Thin film conductive polymers on aluminum surfaces: interfacial charge-transfer and anticorrosion aspects

Cited by 53 publications

References 1 publication

Vibrational Study of Short-Range Order and Structure of Polyaniline Bases and Salts

Vibrational Study of Short-Range Order and Structure of Polyaniline Bases and Salts

Synthesis of a directionally-conductive polyaniline hydrogel composite by vapor deposition.

Compósitos de polianilina e nanopartículas de magnetita eletropolimerizados sobre o aço AISI 1020: correlação entre variáveis operacionais, características eletroquímicas e propriedades anticorrosiva

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