Application of electrochemical quartz microbalance to determine the stoichiometry of ion movement during doping - undoping processes in polypyrrole

Bilger, R.; Heınze, Jürgen

doi:10.1016/0379-6779(91)91199-k

Cited by 32 publications

(17 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since these values are in the same range as those for 4,4′-disubstituted diphenylamines, the model compound 13 can be characterized electrochemically as a diphenylamine system. 22,23 Further scans at potentials over 1.6 V lead to irreversible oxidation. The nature of this process is not fully understood yet, but further investigations are underway.…”

Section: Ii2 Polymerization Reactionsmentioning

confidence: 99%

Poly(phenylene sulfide−phenyleneamine) (PPSA): The First Hybrid Structure of Poly(phenylene sulfide) and Polyaniline

et al. 1998

View full text Add to dashboard Cite

High molecular weight poly(phenylene sulfide−phenyleneamine) (PPSA, M n = 1.5 × 105) was synthesized via a poly(sulfonium) cation through an acid-induced polycondensation reaction of [4-(methylsulfinyl)phenyl]phenylamine. To our best knowledge, the new polymer represents the first hybrid structure of poly(phenylene sulfide) (PPS) and polyaniline (PAni). In contrast to these two intensively studied polymers, PPSA exhibits a high solubility in solvents, such as THF, DMF, DMSO, and NMP. DSC and X-ray studies revealed the completely amorphous structure of PPSA, which cannot even be influenced by annealing the polymer at temperatures above the glass transition. Furthermore, electronic properties were studied by cyclic voltammetry, and preliminary doping experiments for elucidating the electrical conductivity were carried out.

show abstract

Section: Ii2 Polymerization Reactionsmentioning

confidence: 99%

Poly(phenylene sulfide−phenyleneamine) (PPSA): The First Hybrid Structure of Poly(phenylene sulfide) and Polyaniline

et al. 1998

View full text Add to dashboard Cite

show abstract

“…The mechanics of this reaction have been extensively described. [45][46][47][48][49] Here, the large anion, dodecylbenzenesulfonate (DBS), is incorporated within the pPy matrix …”

Section: Resultsmentioning

confidence: 99%

Actuatable Membranes Based on Polypyrrole-Coated Vertically Aligned Carbon Nanofibers

et al. 2008

View full text Add to dashboard Cite

Nanoporous membranes are applicable to a variety of research fields due to their ability to selectively separate molecules with high efficiency. Of particular interest are methods for controlling membrane selectivity through externally applied stimuli and integrating such membrane structures within multiscale systems. Membranes comprised of deterministically grown, vertically aligned carbon nanofibers (VACNFs) are compatible with these needs. VACNF membranes can regulate molecular transport by physically selecting species as they pass between the fibers. Defined interfiber spacing allows for nanoscale control of membrane pore structure and resultant size selectivity. Subsequent physical or chemical modification of VACNF structures enables the tuning of physical pore size and chemical specificity allowing further control of membrane permeability. In this work, the dynamic physical modulation of membrane permeability that results when VACNFs are coated with an electrically actuatable polymer, polypyrrole, is demonstrated. Electrochemical reduction of polypyrrole on the VACNFs results in controlled swelling of the diameter of the nanofibers that in turn decreases the pore size. Dynamic control of membrane pore size enables selective transport and gating of nanoscale pores.

show abstract

“…where some CPs may undergo only one of the reactions in (4) (from reduced to neutral and vice versa or from neutral to oxidized and vice versa) and others may undergo both of them depending on their state. [12] Bilger and Heinze showed that changes in the mass of PPy films occur during redox as a result of ion movement into and out of the polymer [13] and that redox cycling of PPy is characterized by a constant contribution of ions to the diffusion process to maintain charge neutrality. In addition, they showed that mass transfer occurs during polymerization and redox reaction because of currentless diffusion which they attributed to the movement of solvent and neutral electrolyte salt.…”

Section: Neutral Chainsmentioning

confidence: 99%

Conjugated Polymer Actuators and Devices: Progress and Opportunities

2019

View full text Add to dashboard Cite

Conjugated polymers (CP), as exemplified by polypyrrole (PPy), are intrinsically conducting polymers with potential for development as soft actuators or 'artificial muscles' for numerous applications. Significant progress has been made in our understanding of these materials and the actuation mechanisms, aided by the development of physical and electrochemical models. Current research is focused on developing applications utilizing the advantages that CP actuators have (e.g. low driving potential, easy to miniaturise) over other actuating materials and on developing ways of overcoming their inherent limitations. CP actuators are available as films, filaments/yarns and textiles, operating in liquids as well as in air for, ready for use by engineers. This review initially highlights the milestones made in understanding these unique materials and their development as actuators. The primary focus is on the recent progress, developments, applications, and future opportunities for improvement and exploitation of these materials possessing a wealth of multifunctional properties.Received: ((will be filled in by the editorial staff))Revised: ((will be filled in by the editorial staff))

show abstract

Application of electrochemical quartz microbalance to determine the stoichiometry of ion movement during doping - undoping processes in polypyrrole

Cited by 32 publications

References 4 publications

Poly(phenylene sulfide−phenyleneamine) (PPSA): The First Hybrid Structure of Poly(phenylene sulfide) and Polyaniline

Poly(phenylene sulfide−phenyleneamine) (PPSA): The First Hybrid Structure of Poly(phenylene sulfide) and Polyaniline

Actuatable Membranes Based on Polypyrrole-Coated Vertically Aligned Carbon Nanofibers

Conjugated Polymer Actuators and Devices: Progress and Opportunities

Contact Info

Product

Resources

About