Lee Minyoung, Park Jin-Soo
Department of Green Chemical Engineering, College of Engineering, Sangmyung University, Cheonan 31066, Republic of Korea.
Future Environment and Energy Research Institute, Sangmyung University, Cheonan 31066, Republic of Korea.
Membranes (Basel). 2024 Dec 12;14(12):269. doi: 10.3390/membranes14120269.
Four distinct pore-filling anion exchange membranes (PFAEMs) were prepared, and their mechanical properties, ion conductivity, and performance in anion exchange membrane water electrolysis (AEMWE) were evaluated. The fabricated PFAEMs demonstrated exceptional tensile strength, which was approximately 14 times higher than that of the commercial membrane, despite being nearly half as thin. Ion conductivity measurements revealed that acrylamide-based membranes outperformed benzyl-based ones, exhibiting 25% and 41% higher conductivity when using crosslinkers with two and three crosslinking sites, respectively. The AEMWE performance directly correlated with the hydrophilicity and ion exchange capacity (IEC) of the membranes. Specifically, AE_3C achieved the highest performance, supported by its superior IEC and ionic conductivity. Durability tests showed that AE_3C outlasted the commercial membrane, with a delayed voltage increase corresponding to its higher IEC, confirming the importance of increased ion-exchange functional groups in ensuring longevity. These results highlight the critical role of hydrophilic monomers and crosslinker structure in optimizing PFAEMs for enhanced performance and durability in AEMWE applications.
制备了四种不同的填充孔阴离子交换膜（PFAEMs），并对其机械性能、离子电导率以及在阴离子交换膜水电解（AEMWE）中的性能进行了评估。所制备的PFAEMs表现出优异的拉伸强度，尽管其厚度几乎只有商业膜的一半，但拉伸强度却比商业膜高出约14倍。离子电导率测量结果表明，基于丙烯酰胺的膜性能优于基于苄基的膜，当使用具有两个和三个交联位点的交联剂时，其电导率分别高出25%和41%。AEMWE性能与膜的亲水性和离子交换容量（IEC）直接相关。具体而言，AE_3C凭借其卓越的IEC和离子电导率实现了最高性能。耐久性测试表明，AE_3C的使用寿命超过了商业膜，其电压升高延迟与其较高的IEC相对应，这证实了增加离子交换官能团在确保耐久性方面的重要性。这些结果突出了亲水性单体和交联剂结构在优化PFAEMs以提高AEMWE应用中的性能和耐久性方面的关键作用。
