Investigation of ion transport and water content properties in anion exchange membranes based on polysulfone for solid alkaline fuel cell application

Document Type: Research Paper

Authors

1 School of Chemical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran

2 School of Chemical Engineering, Iran University of Science and Technology, Tehran, Iran

3 Green Research Center (GRC) & School of Chemical Engineering (SChE) Iran University of Science & Technology

Abstract

In present research work, homogeneous anion exchange membranes based on polysulfone (QAPSFs) were prepared via chloromethylation, amination and alkalization. In amination step, trimethylamine and N,N,N',N'-tetramethyl-1,6-hexanediamine were used as amination and crosslinking agents, respectively. The chloromethylated polysulfone was characterized by 1HNMR spectroscopy and chloromethylation degree was calculated using peak area integration. Ion transport properties such as ionic conductivity, ion exchange capacity, activation energy for hydroxide ion transport were measured for the prepared anion exchange membranes. Furthermore, water content associated properties such water uptake and hydrated number were determined for these membranes. According to the obtained results, the membrane with crosslinking agent (QAPSF-2) shows ion transport properties nearly similar to the membrane without crosslinker (QAPSF-1). Although, QAPSF-2 has more improved water content associated properties and reasonable dimensional stability in contrast to QAPSF-1. Finally, According to the ionic transport measurements and water content characterizations, the prepared QAPSF membranes can be denoted as good candidates for solid alkaline fuel cell application.

Keywords

Main Subjects


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