School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi 440-746, Korea.
Molecules. 2020 Dec 31;26(1):161. doi: 10.3390/molecules26010161.
A series of hybrid proton exchange membranes were synthesized via in situ polymerization of poly (2-acrylamido-2-methyl-1-propanesulfonic acid) PMPS with sulfonated poly (1,4-phenylene ether-ether-sulfone) (SPEES). The insertion of poly (2-acrylamido-2-methyl-1-propanesulfonic acid) PMPS, between the rigid skeleton of SPEES plays a reinforcing role to enhance the ionic conductivity. The synthesized polymer was chemically characterized by fourier-transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance H NMR spectroscopy to demonstrate the successful grafting of PMPS with the pendent polymer chain of SPEES. A variety of physicochemical properties were also investigated such as ion exchange capacity (IEC), proton conductivity, water uptake and swelling ratio to characterize the suitability of the formed polymer for various electrochemical applications. SP-PMPS-03, having the highest concentration of all PMPS, shows excellent proton conductivity of 0.089 S cm at 80 °C which is much higher than SPEES which is ~0.049 S cm. Optimum water uptake and swelling ratio with high conductivity is mainly attributed to a less ordered arrangement polymer chain with high density of the functional group to facilitate ionic transport. The residual weight was 93.35, 92.44 and 89.56%, for SP-PMPS-01, 02 and 03, respectively, in tests with Fenton's reagent after 24 h. In support of all above properties a good chemical and thermal stability was also achieved by SP-PMPS-03, owing to the durability for electrochemical application.
通过聚（2-丙烯酰胺-2-甲基-1-丙磺酸）PMPS 与磺化聚（1,4-亚苯基醚-醚-砜）（SPEES）的原位聚合，合成了一系列混合质子交换膜。聚（2-丙烯酰胺-2-甲基-1-丙磺酸）PMPS 的插入在 SPEES 的刚性骨架之间起到增强作用，从而提高离子电导率。通过傅里叶变换红外光谱（FT-IR）和核磁共振 H NMR 光谱对合成的聚合物进行了化学表征，以证明 PMPS 与 SPEES 的悬垂聚合物链成功接枝。还研究了各种物理化学性质，如离子交换容量（IEC）、质子电导率、吸水率和溶胀比，以表征形成的聚合物是否适合各种电化学应用。SP-PMPS-03 具有所有 PMPS 中最高的浓度，在 80°C 时表现出 0.089 S cm 的优异质子电导率，远高于 SPEES 的 0.049 S cm。高电导率的最佳吸水率和溶胀比主要归因于聚合物链具有较少的有序排列和高密度的功能基团，有利于离子传输。在 Fenton 试剂 24 小时后测试中，SP-PMPS-01、02 和 03 的残余重量分别为 93.35%、92.44%和 89.56%。SP-PMPS-03 还具有良好的化学和热稳定性，支持所有上述特性，这是由于其具有电化学应用的耐久性。
