Pasquini Luca, Sauvan Maxime, Narducci Riccardo, Sgreccia Emanuela, Knauth Philippe, Di Vona Maria Luisa
CNRS, MADIREL UMR 7246 (ELMA Team) and International Laboratory "Ionomer Materials for Energy" (LIME), Aix-Marseille University, 13013 Marseille, France.
International Laboratory "Ionomer Materials for Energy" (LIME), Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy.
Membranes (Basel). 2022 Nov 17;12(11):1159. doi: 10.3390/membranes12111159.
The hydrolytic stability of ionomer membranes is a matter of concern for the long-term durability of energy storage and conversion devices. Various reinforcement strategies exist for the improvement of the performances of the overall membrane. We propose in this article the stabilization of membranes based on aromatic ion conducting polymers (SPEEK and SPPSU) by the introduction of an electrospun mat of inexpensive PPSU polymer. Characterization data from hydrolytic stability (mass uptake and dimension change) and from mechanical and conductivity measurements show an improved stability of membranes in phosphate buffer, used for enzymatic fuel cells, and in distilled water. The synergistic effect of the reinforcement, together with the casting solvent and the thermal treatment or blending polymers, is promising for the realization of high stability ionomer membranes.
离聚物膜的水解稳定性是储能和转换装置长期耐久性的一个重要问题。存在各种用于改善整体膜性能的增强策略。在本文中，我们提出通过引入廉价的聚亚苯基砜（PPSU）聚合物的电纺垫来稳定基于芳香族离子导电聚合物（磺化聚醚醚酮（SPEEK）和磺化聚亚苯基砜（SPPSU））的膜。来自水解稳定性（质量吸收和尺寸变化）以及机械和电导率测量的表征数据表明，膜在用于酶燃料电池的磷酸盐缓冲液和蒸馏水中的稳定性得到了提高。增强作用与浇铸溶剂以及热处理或共混聚合物的协同效应，对于实现高稳定性离聚物膜很有前景。
