Ion and Molecule Transport in Membrane Systems 3.0 and 4.0

Nikonenko, Victor; Pismenskaya, Natalia

doi:10.3390/ijms24098211

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…A model describing their structure was proposed by Gierke et al on the basis of small-angle X-ray scattering data for Nafion membranes [42]. It should also be mentioned that there is a strong correlation between water uptake, transport properties of ion-exchange membranes, and relative humidity [43,44]. Pores in such membranes cannot be detected even using transmission electron microscopy, since they disappear when the chamber with samples is evacuated (high resolution electron microscopy requires samples to be imaged under high vacuum).…”

Section: Resultsmentioning

confidence: 99%

C2-Hydrocarbon Mixture Separation on Polyethylene Membranes with Grafted Sulfonated Polystyrene in H+, Li+ and Na+ Forms

Zhilyaeva,

Sofronov,

Mironova

et al. 2023

Processes

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The olefin separation from their mixture with paraffins by facilitated transport membranes is a very important process for the further macromolecular compounds production. Membranes loaded with silver ions, which are responsible for the facilitated olefin transport, are instable with time due to their reduction, while those containing protons catalyze the polymerization of olefins. In this work, membranes based on polyethylene with grafted sulfonated polystyrene in various ionic forms (H+, Li+, Na+) were used for the first time for the separation of the ethylene/ethane mixture. The influence of sulfonation time, relative humidity, and various ionic forms on ethylene separation was studied. The SEM study shows a non-uniform sulfur distribution over the membrane thickness for membranes sulfonated for different reaction times. With increasing sulfonation time and relative humidity the ethylene permeability and the factor of its separation with ethane increase. Separation factors for membranes in the Li+-form are shown to be as high as for membranes in the H+-form. A possible mechanism for the facilitated ethylene transport is discussed.

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Section: Resultsmentioning

confidence: 99%

C2-Hydrocarbon Mixture Separation on Polyethylene Membranes with Grafted Sulfonated Polystyrene in H+, Li+ and Na+ Forms

Zhilyaeva,

Sofronov,

Mironova

et al. 2023

Processes

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Modeling of memory effects in nanofluidic diodes

Cervera,

Portillo,

Ramirez

et al. 2024

Physics of Fluids

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Nanofluidic diodes and ionic solutions find application in electrochemical circuits for information processing, controlled release, and signal conversion in hybrid devices. Here, we describe a physical model that accounts for the memory effects observed in conical nanopores in terms of the driving signal and ionic solution characteristics. The concepts invoked describe the device operation on the basis of the electrical interaction between the pore surface charges and the nanoconfined ionic solution. The physical insights provided can explain the experimental dependence of the nanofluidic tunability on the amplitude and frequency of the driving signal, the ionic concentration, and the solution pH. The model should also be useful for the design of electrochemical circuits based on ionic conduction in asymmetric memristors.

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Ion and Molecule Transport in Membrane Systems 3.0 and 4.0

Abstract: This book is a collection of papers published in the 3rd and 4th Special Issues of the International Journal of Molecular Sciences under the standard title, “Ion and Molecule Transport in Membrane Systems” [...]

Cited by 2 publications

References 26 publications

C2-Hydrocarbon Mixture Separation on Polyethylene Membranes with Grafted Sulfonated Polystyrene in H+, Li+ and Na+ Forms

C2-Hydrocarbon Mixture Separation on Polyethylene Membranes with Grafted Sulfonated Polystyrene in H+, Li+ and Na+ Forms

Modeling of memory effects in nanofluidic diodes

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