Effect of Hydrophobic Butyl Group on the Physicochemical properties of Anion Exchange Membranes based on Polyketone PB-FPKKf/f′(X)g Copolymer

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-06-22 DOI:10.1016/j.electacta.2025.146752

Afaaf Rahat Alvi, Keti Vezzu, Paolo Sgarbossa, Gioele Pagot, Angeloclaudio Nale, Vito Di Noto

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引用次数: 0

Abstract

In this report, anion exchange membranes based on poly[(N-(1,4-dimethyl piperaziniumethyl)-ethylenepyrrole)(X)/ethyleneketone/propyleneketone/N-(n-butyl)ethylenepyrrole], where X = I⁻ or OH⁻, terpolymer are prepared by converting the 1,4-diketonic groups of an aliphatic poly[ethylene ketone/propylene ketone] (PKK) into pyrrole substituted repeat units through a Paal-Knorr reaction. These materials are prepared by co-reacting 1-(2-aminoethylpiperazine) and n-butylamine in different amines/PKK molar ratios to investigate the effect of varying degree of functionalization (f) and the incorporation of hydrophobic butyl pendant groups on the physicochemical properties of the membranes. The molecular structure and composition of the membranes are confirmed by ATR-FTIR and CHNS/O elemental analysis, while their electrochemical and physical properties are characterized through evaluation of water uptake (WU%), ion exchange capacity (IEC), thermal stability, ionic conductivity, and alkaline stability. BES studies reveal ionic conductivity values of 0.49 and 0.87 mS cm⁻¹ at 50 °C for the membranes in iodide and hydroxide form, respectively. The membrane PB-FPKK_0.47/_0.04(OH)_0.43 demonstrates an exceptional chemical stability for 720 hours at 45 °C in 1M KOH aqueous solution.

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疏水丁基对聚酮PB-FPKKf/f ' (X)g共聚物阴离子交换膜理化性能的影响

在本报告中，通过Paal-Knorr反应将脂肪族聚[乙烯酮/丙烯酮]（PKK）的1,4-二酮基转化为吡咯取代重复单元，制备了以聚[（N-（1,4-二甲基哌嗪甲基）-乙炔吡咯）(X)/乙炔酮/丙烯酮/N-（正丁基）乙炔吡咯]（X = I -或OH -）三元共聚物为基础的阴离子交换膜。这些材料是通过1-（2-氨基乙基哌嗪）和正丁胺以不同的胺/PKK摩尔比共反应制备的，以研究不同程度的功能化(f)和疏水丁基悬垂基团的掺入对膜的物理化学性质的影响。通过ATR-FTIR和CHNS/O元素分析确定了膜的分子结构和组成，并通过吸水性（WU%）、离子交换容量（IEC）、热稳定性、离子电导率和碱性稳定性对膜的电化学和物理性能进行了表征。BES研究表明，在50°C时，膜的离子电导率分别为0.49和0.87 mS cm - 1。该膜PB-FPKK0.47/0.04(OH)0.43在1M KOH水溶液中在45°C下具有720小时的优异化学稳定性。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.