Influence of the water state on the ionic conductivity of ion-exchange membranes based on polyethylene and sulfonated grafted polystyrene

Голубенко, Д. В.; Safronova, E. Yu.; Ilyin, A. B.; Shevlyakova, N. V.; Тверской, В. А.; Dammak, L.; Grande, Daniel; Yaroslavtsev, A. B.

doi:10.1016/j.matchemphys.2017.05.015

Cited by 30 publications

(21 citation statements)

References 37 publications

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“…Freezing of this water was found in grafted membranes with a very high water uptake and a large pore size [ 68 ]. Moreover, its enthalpy value shows that not all water freezes at 0 °C, and about 20 remaining molecules per functional group gradually freeze during further cooling [ 69 ]. The water uptake of most ion-exchange membranes is less, therefore, phase transformations are usually not observed near 0 °C.…”

Section: The Ion Exchange Membrane Structure and Ion Transfermentioning

confidence: 99%

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Стенина

Голубенко

Nikonenko

et al. 2020

IJMS

124

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Nowadays, ion-exchange membranes have numerous applications in water desalination, electrolysis, chemistry, food, health, energy, environment and other fields. All of these applications require high selectivity of ion transfer, i.e., high membrane permselectivity. The transport properties of ion-exchange membranes are determined by their structure, composition and preparation method. For various applications, the selectivity of transfer processes can be characterized by different parameters, for example, by the transport number of counterions (permselectivity in electrodialysis) or by the ratio of ionic conductivity to the permeability of some gases (crossover in fuel cells). However, in most cases there is a correlation: the higher the flux density of the target component through the membrane, the lower the selectivity of the process. This correlation has two aspects: first, it follows from the membrane material properties, often expressed as the trade-off between membrane permeability and permselectivity; and, second, it is due to the concentration polarization phenomenon, which increases with an increase in the applied driving force. In this review, both aspects are considered. Recent research and progress in the membrane selectivity improvement, mainly including a number of approaches as crosslinking, nanoparticle doping, surface modification, and the use of special synthetic methods (e.g., synthesis of grafted membranes or membranes with a fairly rigid three-dimensional matrix) are summarized. These approaches are promising for the ion-exchange membranes synthesis for electrodialysis, alternative energy, and the valuable component extraction from natural or waste-water. Perspectives on future development in this research field are also discussed.

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Section: The Ion Exchange Membrane Structure and Ion Transfermentioning

confidence: 99%

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Стенина

Голубенко

Nikonenko

et al. 2020

IJMS

124

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“…The wide possibility for varying the ion-exchange capacity and water uptake of grafted membranes by varying the degree of grafting and crosslinking makes it possible to obtain membranes with unexpected properties. Thus, in membranes with a water uptake significantly exceeding that of Nafion membranes, it turned out to be possible to experimentally show the presence of a fraction of almost pure water in the center of the pores [45].…”

Section: Ion-exchange Membranes: a Way To Increasing Selectivitymentioning

confidence: 99%

Prospects of Membrane Science Development

Apel

Бобрешова

Волков

et al. 2019

Membr. Membr. Technol.

122

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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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“…It means the membrane can maintain performance, because the water state will remain the same at the same water concentration on membrane. The change in water content will influence water state in membrane [18], that would lead to change in ionic conductivity [37][38]. The decrease of water uptake at 10 minutes observation to M1 membrane and M3 membrane may caused by desorption phenomena [39].…”

Section: Membrane Characteristicsmentioning

confidence: 99%

“…The latter may include an addition of nanoparticle in their membrane formulation [15][16][17] which can improve ionic conductivity and transport selectivity of the membrane prepared. However, as cost is also concern, there are also another trend in developing new fuel cell membrane form in expensive material [18]. This leads to the attention on sulfonated polystyrene [19][20][21][22] which easily available in the market and beside its ability for DMFC application [23][24].…”

Section: Introductionmentioning

confidence: 99%

Roles of Preparation Method on Characteristics of Supramolecular-Structured Polymer Electrolyte Membrane Fuel Cell Based on Sulfonated Polystyrene

Hendrana¹,

Semboor

Natanael

et al. 2018

jsmi

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Polystyrene (S-PS) have been developed in Research Centre for Physics LIPI. In forming the supramolecular structure sulfonate groups in S-PS are aligned with polyethylene-graft-maleic anhydride (PE-g-MA) which carried out by dissolution of the constituent and mixing of both. The alignment of sulfonate groups in s-PS is carried out in a liquid form. Therefore, in this study, the effect of concentration of the solution of both polymers constituent to the alignment of the sulfonate groups and the characteristics of the membrane produced is studied. Scanning Electron Microscope (SEM) images show that all membranes prepared are rigid. Differential Scanning Calorimetry (DSC) studied show very significance differences in its crystal sizes. XRD diffraction data also support the previous results. Membrane prepared from very dilute solution having better ion exchange capacity (IEC), water uptake and ionic conductivity. Therefore, the experiments results showing that very low concentration of polymer constituent, clearly, produced better interaction of both, which agree with hyphotesis in this work where supramolecular structure can be formed by mixing two very dilute polymer solutions.Keywords: PEMFC, Sulfonated polystyrene, PE-g-MA, Supramolecular structure ABSTRAK PERAN METODE PREPARASI PADA KARAKTETISTIK DARI POLIMER ELEKTROLIT MEMBRAN FUEL CELL DENGAN STRUKTUR SUPRAMOLEKULAR BERBASIS POLISTIREN TERSULFONASI.Polimer Elektrolit Membran Fuel Cell dengan struktur supramolekular berbasis polistirena tersulfonasi (S-PS) telah dikembangkan di Pusat Penelitian Fisika LIPI. Pada pembentukan struktur supramolekular gugus sulfonat pada polistirena tersulfonasi diarahkan dengan polietilen-graft-anhidrida maleat (PE-g-MA) yang dilakukan dengan melarutkan kedua bahan penyusun tersebut. Pengarahan gugus sulfonat dari S-PS dilakukan dalam kondisi cair. Karenanya, dalam studi ini, efek dari konsentrasi dari kedua larutan polimer penyusun pada pengarahan gugus karbonat dimaksud dan karakteristik-karakteristik dari membran yang dihasilkan akan dipelajari. Image SEM menunjukkan bahwa semua membran yang dibuat adalah rigid. Studi DSC menunjukkan terdapat perbedaan yang sangat berarti pada ukuran kristal. Data XRD juga mendukung hasil-hasil yang diperoleh. Membran yang dibuat dengan larutan yang sangat encer memiliki kapasitas petukaran ion (EIC), tangkapan-air dan konduktifitas ionik yang lebih baik. Oleh karenanya, data eksperimen menunjukkan

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Influence of the water state on the ionic conductivity of ion-exchange membranes based on polyethylene and sulfonated grafted polystyrene

Cited by 30 publications

References 37 publications

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Prospects of Membrane Science Development

Roles of Preparation Method on Characteristics of Supramolecular-Structured Polymer Electrolyte Membrane Fuel Cell Based on Sulfonated Polystyrene

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