Electrochemical Behavior of Polyaniline-Modified Cation-Exchange Heterogeneous Membranes in Solutions Containing Mono- and Bivalent Cations

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2023-06-05 DOI:10.1134/S2517751623030034

M. A. Brovkina, N. A. Kutenko, N. V. Loza

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引用次数: 1

Abstract

A series of composite ion-exchange membranes based on an heterogeneous cation-exchange MK‑40 membrane and polyaniline is obtained under the conditions of electrodiffusion of a monomer and an oxidizing agent. The process of polyaniline synthesis on the membrane surface is accompanied by recording of chronopotentiograms and pH of the solution leaving the desalination compartment. The initial cation-exchange MK-40 membrane and obtained composites based on it are studied by voltammetry and chronopotentiometry in solutions of NaCl, CaCl₂, and MgCl₂ in the same flow-type electrodialysis cell, in which the composites are obtained. To calculate the transport numbers of counterions in the membranes in solutions of CaCl₂ and MgCl₂ by chronopotentiometry, the apparent fraction of the conductive membrane surface in a solution of NaCl is calculated based on the experimental data on the potentiometric transport numbers of counterions in the membrane. The conditions for the synthesis of polyaniline on the surface of an heterogeneous MK-40 membrane which result in the preparation of samples with selectivity to singly charged ions are found out.

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聚苯胺修饰阳离子交换非均相膜在含一价和二价阳离子溶液中的电化学行为

在单体和氧化剂电扩散的条件下，以非均相阳离子交换的MK - 40膜和聚苯胺为基础，制备了一系列复合离子交换膜。在膜表面合成聚苯胺的过程中，还记录了离开脱盐室的溶液的时间电位图和pH值。采用伏安法和时电位法对初始阳离子交换MK-40膜及其复合材料在同流型电渗析池中NaCl、CaCl2和MgCl2溶液中进行了研究，得到了复合材料。为了用时间电位法计算CaCl2和MgCl2溶液中膜中反离子的传输数，根据膜中反离子电位传输数的实验数据，计算了NaCl溶液中导电膜表面的表观分数。找出了在异相MK-40膜表面合成聚苯胺的条件，从而制备出对单电荷离子有选择性的样品。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.