This work reports the permselectivity of an ionene-based anion exchange membrane – ionenes are a class of polymer in which cationic charged groups are located directly on the polymer backbone, as opposed to being pendant. The ionone studied, in the form of commercially available Aemion® anion exchange membranes, is based on hexamethyl-p-terphenyl poly (bibenzimidazolium) (HMT-PMBI), which has been explored in several electrochemical devices, yet their transport numbers, permselectivity, and through-plane conductivity, have not been reported. Measurement of transport properties was carried out on membranes (AF1-HNN8-25, AF1-HNN8-50, AF1-HNN5-25, AF1-HNN5-50) of varying ion exchange capacity and thickness, using the static method in which inherent experimental errors due to liquid junction potentials were elucidated and circumvented. Permselectivity, area specific conductance, and conductivity of Aemion® AEMs are correlated using their fixed charge group concentration. Due to its low water content and high fixed group concentration, the permselectivity of AF1-HNN5-X is higher than AF1-HNN8-X AEMs, despite the latter's higher IEC, but its ionic resistance is lower. Thicker AEMs were confirmed to be more permselective, which can be explained by their relatively lower water content and consequently higher fixed charge group concentration. The permselectivity, area specific conductance, and permselectivity to resistance ratio (α/R) of Aemion® AF1-HNN5-50 were found to be comparable to Selemion AMV, a common anion exchange membrane. The permselectivity/resistance (α/R) value of AF1-HNN8-25 was three times higher than Selemion AMV by virtue of its high ionic conductance.

这项工作报告了基于紫罗烯的阴离子交换膜的渗透选择性——紫罗烯是一类聚合物，其中带阳离子的基团直接位于聚合物主链上，而不是悬垂的。所研究的紫罗兰酮以市售 Aemion® 阴离子交换膜的形式存在，基于六甲基-p-三联苯聚（联苯并咪唑鎓）（HMT-PMBI）已在多种电化学装置中进行了探索，但尚未报道其传输数、渗透选择性和穿过平面电导率。在不同离子交换容量和厚度的膜（AF1-HNN8-25、AF1-HNN8-50、AF1-HNN5-25、AF1-HNN5-50）上进行传输特性的测量，使用静态方法，其中固有实验由于液体接界电位引起的错误被阐明和规避。Aemion® AEM 的渗透选择性、面积比电导率和电导率与它们的固定电荷基团浓度相关。由于其含水量低和固定基团浓度高，AF1-HNN5-X的渗透选择性高于AF1-HNN8-X AEM，尽管后者的IEC较高，但其离子电阻较低。较厚的 AEM 被证实具有更高的渗透选择性，这可以通过其相对较低的水含量和因此较高的固定电荷基团浓度来解释。发现 Aemion® AF1-HNN5-50 的选择性渗透率、面积比电导率和选择性渗透率与电阻比 (α/R) 与 Selemion AMV（一种常见的阴离子交换膜）相当。由于其高离子电导，AF1-HNN8-25 的渗透选择性/电阻 (α/R) 值是 Selemion AMV 的三倍。普通的阴离子交换膜。由于其高离子电导，AF1-HNN8-25 的渗透选择性/电阻 (α/R) 值是 Selemion AMV 的三倍。普通的阴离子交换膜。由于其高离子电导，AF1-HNN8-25 的渗透选择性/电阻 (α/R) 值是 Selemion AMV 的三倍。