Preparation of Heterogeneous Cation- and Anion-Exchange Membranes by Eco-Friendly Method: Electrochemical Characterization and Desalination Performance

Q2 Materials Science
J. Gohil, P. Ray
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引用次数: 3

Abstract

This paper emphases on the preparation, characterization and application of heterogeneous cation- and anion-exchange membranes. Membranes were made by solution casting method from the blends comprises of ion-exchange resins and eco-friendly polymer binder polyvinyl alcohol (PVA). Dimensional stability of membranes in water was controlled by crosslink density of binder. Physicochemical and electrochemical characteristics of ion-exchange membranes such as ion-exchange capacity (IEC), swelling (%), water uptake (%), surface electrical resistance, and transport number have been optimized by varying the resin:binder ratio. Thermal properties of the membranes were studied using the thermogravimetric analysis and differential scanning calorimetry to evaluate the thermal degradation pattern/stability and transition temperature, i.e., Tg of ionic membranes. The morphology of membrane samples were studied using scanning electron microscope. Heterogeneous ion-exchange membranes (HIXM) prepared from the water soluble binder showed superior electrochemical properties and homogeneous morphology compared to HIXMs prepared using the organic solvent based polymer binder polyvinyl chloride (PVC) and when used for desalination in Electrodialysis stack exhibits 85.5% salt reduction.
生态友好法制备非均相阳离子阴离子交换膜:电化学表征及脱盐性能
本文重点介绍了非均相阳离子阴离子交换膜的制备、表征及其应用。以离子交换树脂和环保型高分子粘合剂聚乙烯醇(PVA)为原料,采用溶液浇铸法制备膜。膜在水中的尺寸稳定性受粘合剂交联密度的控制。通过改变树脂与粘合剂的比例,优化了离子交换膜的物理化学和电化学特性,如离子交换容量(IEC)、溶胀(%)、吸水率(%)、表面电阻和输运数。采用热重分析和差示扫描量热法研究了膜的热性能,评价了离子膜的热降解模式/稳定性和转变温度Tg。利用扫描电镜对膜样品的形貌进行了研究。与使用有机溶剂基聚合物粘合剂聚氯乙烯(PVC)制备的非均相离子交换膜(HIXM)相比,由水溶性粘合剂制备的非均相离子交换膜(HIXM)具有优越的电化学性能和均匀的形貌,当用于电渗析stack脱盐时,其盐还原率为85.5%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Membrane Science and Research
Journal of Membrane Science and Research Materials Science-Materials Science (miscellaneous)
CiteScore
4.00
自引率
0.00%
发文量
1
审稿时长
8 weeks
期刊介绍: The Journal of Membrane Science and Research (JMSR) is an Open Access journal with Free of Charge publication policy, which provides a focal point for academic and industrial chemical and polymer engineers, chemists, materials scientists, and membranologists working on both membranes and membrane processes, particularly for four major sectors, including Energy, Water, Environment and Food. The journal publishes original research and reviews on membranes (organic, inorganic, liquid and etc.) and membrane processes (MF, UF, NF, RO, ED, Dialysis, MD, PV, CDI, FO, GP, VP and etc.), membrane formation/structure/performance, fouling, module/process design, and processes/applications in various areas. Primary emphasis is on structure, function, and performance of essentially non-biological membranes.
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