Classification of Electrochemically Active Polymers

Inzelt, György

doi:10.1007/978-3-642-27621-7_2

Cited by 7 publications

(5 citation statements)

References 1,020 publications

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“…Organic semiconductors are represented by molecular, oligomer, or polymer arrays with alternating π-bonds (arene ring systems) with carbon, hydrogen, or heteroatom (e.g., S, N) species. 1 A prominent polymer in this category is polyaniline (PANI), which can be semiconductive or fully electrically conductive, depending on its oxidation states and level of doping. 2 PANI has been applied over a wide range of applications in the electronics industry since it exists in variable oxidation states, which favor its use in the fabrication of electrochromic glasses.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Anisimov

Evitts

Cree

et al. 2022

ACS Appl. Polym. Mater.

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The current study was focused on electrically conductive polyaniline (PANI)-based polymer composites and their films, which contain poly(vinyl alcohol) (PVA). The goal of this research was to evaluate PANI composites that contain biopolymer platforms (chitosan or cellulose micro-powder) as materials for humidity sensing, which were compared against composites that contain carbon nanofibers in lieu of the biopolymer. Ternary film materials were prepared by a two-step method: (1) in situ polymerization of PANI onto the biopolymer or carbon support to yield a binary composite, and (2) physical blending of the resulting binary composite with PVA to yield a ternary composite in a film form. The following mechanical properties were estimated: (a) elastic (Young’s) modulus and stiffness, (b) ductility and toughness, and (c) yield and tensile strength. The Young’s modulus improved as the chitosan fraction increased, which indicates that chitosan can be used as a mechanical reinforcement additive for PANI-based composites. The electrical properties were characterized by plots of electrical conductivity versus relative humidity, whereas mechanical properties were evaluated using tensile testing. Overall, chitosan-based films showed good mechanical properties, moderate electrical conductivity, and favorable high humidity response and moisture uptake. Cellulose- and carbon-based composites were generally inferior to chitosan for most properties, except for higher conductivity. Due to the high brittleness of carbon-based composites, the practical utility of carbon nanofibers for humidity sensing is limited in the case of pristine carbon materials. This work reveals that ternary PANI-based composites are potential candidates for humidity sensor materials, where moderate PANI-to-chitosan/cellulose/carbon ratios enable good moisture uptake and electromechanical properties of composites. PANI/biopolymer composites are a promising class of sustainable materials due to the ability to tailor their structure and properties, in contrast to conventional ceramic humidity sensor materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Anisimov

Evitts

Cree

et al. 2022

ACS Appl. Polym. Mater.

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“…Así, en el campo de los polímeros conductores encontraremos dos grandes clasificaciones: polímeros intrínsecamente conductores y composites poliméricos. Los primeros se desarrollaron en la década del ´70 y en su arreglo molecular radica su capacidad conductora, ya que contienen estructuras del tipo conjugadas extendidas, con dobles enlaces, que mediante mecanismos de oxidaciónreducción, permite la movilidad de electrones a lo largo de la cadena polimérica (Inzelt, 2012). Si la movilidad de los electrones resulta insuficiente, el polímero puede ser "dopado" mediante el agregado de elementos químicos diferentes a los de la estructura original, que alteran el perfil energético de las bandas conductoras.…”

Section: Desarrollounclassified

Jornadas de Ciencia y Tecnología 2021

UTN¹

2021

AJEA

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Las Jornadas de Ciencia y Tecnología 2021, de la Universidad Tecnológica Nacional, Facultad Regional San Francisco, busca a través de la presentación de investigaciones en marcha y de conferencias plenarias, estrechar lazos entre los distintos grupos de investigación de esta y otras Facultades relacionados a la ingeniería entre ellas de Electrónica, Electromecánica, Sistemas de información, Industrial, Química, Licenciatura en Administración Rural y resto de especialidades. Estas Jornadas se vienen desarrollando desde el año 2002 y son coordinadas por la Secretaría de Ciencia y Tecnología de la UTN Facultad Regional San Francisco y constituyen un espacio de abordaje de contenidos científicos y tecnológicos para estudiantes, docentes e investigadores y profesionales. Las conferencias plenarias fueron especialmente seleccionadas por el consejo asesor de cada uno de los departamentos de las carreras que se dictan en la Facultad; las cuales abordan temas específicos de cada carrera como así también temas como Vigilancia tecnológica e inteligencia estratégica, patentes y difusión de la ciencia y la tecnología, entre otros. Como en la edición anterior, las Jornadas de Ciencia y Tecnología 2021 se presentan en modalidad virtual; más precisamente a través de la plataforma Zoom y mediante transmición en vivo por el canal de youtube de la Facultad Regional San Francisco. En esta edición, se han recibido 60 trabajos de investigación que se presentan en este libro digital; el cual posee referato y cumple con las normativas de la revista AJEA (Actas de jornadas y eventos académicos de la UTN). Los principales beneficios son: Conocer y generar proyectos conjuntos de investigación coordinados entre distintas áreas especializadas de la Facultad y Facultades vecinas. Desarrollo de proyectos de transferencia entre el área académica y la industria. Fortalecimiento de las actividades de investigación de los docentes de la Facultad. MIEMBROS DEL COMITÉ ORGANIZADORAlfonsina Ester AndreattaClaudia del Valle MercolJessica Pamela PettitiMaría José Gallo MIEMBROS DEL COMITÉ CIENTÍFICOIng. Eduardo GalianoDra. Paula GarneroIng. Gustavo YoaquinoMg. Gastón PerettiCr. Daniel RicciIng. Gabriel CeruttiDr. Diego Martín FerreyraIng. Walter ToniniDra. Verónica NicolauDra. María Eugenia TavernaIng. Raúl MarlattoDr. Matías RaspoIng. Emanuel BernardiDr. Javier RedolfiMg. Juan Carlos CalloniIng. Javier VignoloCra. Maricel RovasioIng. Carolina ApendinoIng. Diego CocconiDra. Alfonsina Ester Andreatta

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“…Redox polymers contain unconjugated backbones and covalently attached redox sites, either built into the chain, or as pendent groups. 8,9 RPs need to have a high density of redox active groups in the polymer backbone to be (semi) conducting, to allow charge transport via hopping.…”

Section: Introductionmentioning

confidence: 99%

Gel actuators based on polymeric radicals

et al. 2019

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Low-voltage electrochemical actuation of radical polymer gels has been demonstrated in an organic electrolyte. Polymer gels were prepared by post-modification of active-ester precursor gels with an amine-functionalised radical. A combination of few-layer graphene and multiwall carbon nanotubes gave high conductivity and improved actuation in the gels, with 32% linear actuation. The actuator system showed good stability over at least 10 cycles, showing its promise. The cycle time was several hours due to mass-transport limited transport of ions and solvent into the device.Scheme 1 The reversible redox process in a polymer-based TEMPO/TEMPO + couple.33188 | RSC Adv., 2019,9,[33187][33188][33189][33190][33191][33192] This journal is Scheme 2 Post-modification of active-ester precursor gels with an amine-functionalised radical in the synthesis of the actuator gels. Fig. 1 TEM image of (a) gel G2 without and (b) G2-C with MWCNTs and FLGs (both to same scale).This journal is

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Classification of Electrochemically Active Polymers

Cited by 7 publications

References 1,020 publications

Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Renewable Hybrid Biopolymer/Polyaniline Composites for Humidity Sensing

Jornadas de Ciencia y Tecnología 2021

Gel actuators based on polymeric radicals

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