Membranes Based on PVdF–HFP and Alkylammonium Protic Ionic Liquids: Thermal and Transport Properties

L. E. Shmukler; Шмуклер Л. Э.; Yu. A. Fadeeva; Фадеева Ю. А.; N. M. Stel’makh; Стельмах Н. М.; L. P. Safonova; Сафонова Л. П.

doi:10.31857/S0044453723010284

Membranes Based on PVdF–HFP and Alkylammonium Protic Ionic Liquids: Thermal and Transport Properties

Authors: Shmukler L.E.¹, Fadeeva Y.A.¹, Stel’makh N.M.², Safonova L.P.¹
Affiliations:
1. Krestov Institute of Chemistry of Solutions, Russian Academy of Sciences
2. Ivanovo State University of Chemical Technology
Issue: Vol 97, No 1 (2023)
Pages: 166-174
Section: ФИЗИЧЕСКАЯ ХИМИЯ ПРОЦЕССОВ РАЗДЕЛЕНИЯ. ХРОМАТОГРАФИЯ
Submitted: 27.02.2025
Published: 01.01.2023
URL: https://ruspoj.com/0044-4537/article/view/668897
DOI: https://doi.org/10.31857/S0044453723010284
EDN: https://elibrary.ru/BDDRGU
ID: 668897

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Abstract

Casting from a solution is used to obtain proton-conducting membranes based on a poly(vinylidenefluoride-co-hexafluoropropylene) copolymer doped with diethylammonium hydrogen sulfate and diethylammonium mesylate with different levels of doping. An IR spectroscopic study is performed, and the phase behavior of the obtained membranes, their thermal and electrochemical stability, and specific electrical conductivity are investigated. It is established that doping protic ionic liquids into PVdF-HFP copolymer reduces the degree of its crystallinity. It has been shown that all membranes are thermally stable up to 290–300°C, and their conductivity at 145°C varies from 1.6 to 10.4 mS cm–1, depending on the level of doping.

Keywords

proton-conducting membranes, thermal characteristics, electrical conductivity, IR spectroscopy

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