Asymmetry of current-voltage characteristics of ion-exchange membranes: Model of charge density of fixed groups linear by membrane thickness

Филиппов, А. Н.

doi:10.1134/s1023193517030053

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…The effect of asymmetry of diffusion permeability discovered for such membranes more than 30 years ago, which occurs upon the change in their orientation relative to the direction of the gradient of the electrolyte concentration, was first theoretically explained for charged bilayer membranes in [136]. Asymmetry is observed for the rejection coefficient of bilayer (selective layer + substrate) and modified membranes upon pressuredriven membrane separation [137] and for the voltammetric curves of gradient-modified (e.g., by polyaniline) MF-4SK membranes [138]. The above-listed asymmetry effects have a potential perspective in the fabrication of membrane probes, sensors, and diodes, because of which their theoretical and experimental investigation appears to be fundamentally important.…”

Section: Mathematical Modeling Of Porousmentioning

confidence: 99%

Prospects of Membrane Science Development

Apel

Бобрешова

Волков

et al. 2019

Membr. Membr. Technol.

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127

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Membranes are widely used in modern technology. The demand for different types of membranes and membrane processes is increasing every year. This review summarizes the current state of the art and prospects of membrane science developments including membrane materials for gas separation, pervaporation, and pressure-driven membrane processes; ion-exchange, hybrid, and track-etched membranes; membranes for electrochemical sensors; and mathematical modeling of membrane separation processes and ion and water transport in membrane systems. Studies aimed at improving the selectivity and performance of membranes and their stability are surveyed. New approaches to the synthesis and modification of membranes as well as their advanced applications are discussed.

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Section: Mathematical Modeling Of Porousmentioning

confidence: 99%

Prospects of Membrane Science Development

Apel

Бобрешова

Волков

et al. 2019

Membr. Membr. Technol.

Self Cite

127

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“…The asymmetry of transport properties is an important feature of bilayer membranes. When the direction of the driving force (pressure or concentration gradients, electric field) changes, the flux density of solvent, solute [1,2], and electric current [2][3][4][5][6][7] can change significantly. In the latter case, an asymmetry of the current-voltage curves (CVC) is observed.…”

Section: Introductionmentioning

confidence: 99%

Modeling Asymmetry of a Current–Voltage Curve of a Novel MF-4SC/PTMSP Bilayer Membrane

et al. 2021

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A novel bilayer cation-exchange membrane—consisting of a thick layer of a pristine perfluorinated membrane MF-4SC (Russian equivalent of Nafion®-117) and a thinner layer (1 μm) of the membrane, on a base of glassy polymer of internal microporosity poly(1-trimethylsilyl-1-propyne) (PTMSP)—was prepared and characterized. Using the physicochemical characteristics of one-layer membranes MF-4SC and PTMSP in 0.05 M HCl and NaCl solutions, the asymmetric current–voltage curves (CVC) of the bilayer composite were described with good accuracy up to the overlimiting regime, based on the “fine-porous membrane” model. The MF-4SC/PTMSP bilayer composite has a significant asymmetry of CVC that is promising for using it in electromembrane devices, such as membrane detectors, sensors, and diodes.

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