Solvent induced effect on morphology and properties of disulfonated polyarylene ether sulfone block copolymer membranes for PEMFC applications
Solvent induced effect on morphology and properties of disulfonated polyarylene ether sulfone block copolymer membranes for PEMFC applications
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DOI：
10.1016/j.polymer.2022.125626
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发表时间：
2022-12
期刊：
影响因子：
4.6
通讯作者：
Natalie Y. Arnett;Sanjay Kumar Devendhar Singh;D'Andra Moxey;Samaiyah K.A. Mason;R. Sweat;Emily Plunket;R. Moore
中科院分区：
文献类型：
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作者：
Natalie Y. Arnett;Sanjay Kumar Devendhar Singh;D'Andra Moxey;Samaiyah K.A. Mason;R. Sweat;Emily Plunket;R. Moore
为了从根本上了解残留溶剂对聚亚芳基醚砜 (PAES) 膜的粘合特性、热性能和机械性能的影响，进行了系统研究。使用不同的溶剂合成透明的PAES膜，其中包括二甲基甲酰胺(DMF)、二甲基乙酰胺(DMAc)、二甲亚砜(DMSO)和N-甲基-2吡咯烷酮(NMP)。使用 Hansen 溶解度参数 (HSP) 和 Flory-Huggins 相互作用参数 (χP-S) 建立聚合物-溶剂相互作用之间的相关性。质子电导率、热重分析 (TGA)、动态力学分析 (DMA) 和 FTIR 与 χP-Sparameter 相关。使用 DMF 溶剂衍生的 PAES 膜表现出最高的质子电导率 (0.133 ± 0.01 S∙cm−1)。扫描电子显微镜（SEM）证实了无缺陷膜的形成。膜中残留溶剂的存在导致增塑剂效应，这通过 DMA 的储能模量行为得到证实。这项研究将作为开发具有聚合物燃料电池应用所需性能的高性能 PAES 膜的标准方案。
A systematic investigation to ascertain a fundamental understanding of the residual solvent effect on the bonding characteristics, thermal and mechanical properties of poly(arylene ether sulfone) (PAES) membranes was carried out. Transparent PAES membranes were synthesized using different solvents, which include dimethylformamide (DMF), dimethylacetamide (DMAc), dimethylsulfoxide (DMSO), andN-methyl-2pyrrolidone (NMP). A correlation was established between polymer-solvent interaction using Hansen solubility parameters (HSP) and Flory-Huggins interaction parameters (χP-S). Proton conductivity, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and FTIR were correlated with χP-Sparameter. PAES membrane derived using DMF solvent exhibited the highest proton conductivity (0.133 ± 0.01 S∙cm−1). Scanning electron microscopy (SEM) confirmed the formation of defect-free membranes. The presence of residual solvent in the membranes resulted in a plasticizer effect which was confirmed through storage modulus behavior from DMA. This study will act as a standard protocol for the development of high-performance PAES membranes with desired properties for polymer fuel cells applications.