Investigation of the Hydration Dynamics of Various Types of Proton Exchange Membranes

IF 1.1 4区化学 Q4 POLYMER SCIENCE

Polymer Science, Series A Pub Date : 2025-02-22 DOI:10.1134/S0965545X24601394

A. O. Pelageikina, A. O. Krasnova, A. G. Kastsova, A. A. Nechitailov, N. V. Glebova, A. A. Ivanova

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Abstract

Proton-conducting membranes are widely used in various electrochemical systems. The content and state of water in membranes have a significant impact on their properties. Therefore, studies of the interaction of membranes with water are relevant and are the subject of many works in the scientific literature. This paper presents data obtained by studying the dynamics and characteristics of water saturation in three types of membranes consisting of ionomers with a long side chain (Nafion and MF-4SK) and a short side chain (Aquivion). The dynamics of hydration were studied using electron spectroscopy in the near ultraviolet and visible regions, differential thermal analysis, and gravimetry. It has been shown that the process of hydration of different membranes occurs in distinct ways, although it has common patterns, the main one of which is the presence of two-stage hydration: 1. rapid water absorption and 2. slow rearrangement of the membrane structure. The values of equilibrium water content in air-dry membranes and their specific moisture capacity are provided.

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不同类型质子交换膜水合动力学的研究

质子导电膜广泛应用于各种电化学系统中。膜中水分的含量和状态对膜的性能有重要影响。因此，研究膜与水的相互作用是相关的，也是科学文献中许多工作的主题。本文介绍了三种由长侧链离子单体（Nafion和MF-4SK）和短侧链离子单体（Aquivion）组成的膜的水饱和动力学和特性的研究数据。采用近紫外和可见光电子能谱、差热分析和重量法研究了水化动力学。研究表明，不同膜的水化过程以不同的方式发生，尽管它具有共同的模式，其中主要的是两阶段水化的存在：1。2.快速吸水；膜结构缓慢重排。给出了空气干膜的平衡含水量值及其比湿容量。

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来源期刊

Polymer Science, Series A 化学-高分子科学

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.