Manohar Murli, Kim Dukjoon
School of Chemical Engineering, Sungkyunkwan University, Suwon, Kyunggi 16419, Korea.
Membranes (Basel). 2020 Dec 15;10(12):426. doi: 10.3390/membranes10120426.
This present work focused on the aromatic polymer (poly (1,4-phenylene ether-ether-sulfone); SPEES) interconnected/ cross-linked with the aliphatic monomer (2-acrylamido-2-methyl-1-propanesulfonic; AMPS) with the sulfonic group to enhance the conductivity and make it flexible with aliphatic chain of AMPS. Surprisingly, it produced higher conductivity than that of other reported work after the chemical stability was measured. It allows optimizing the synthesis of polymer electrolyte membranes with tailor-made combinations of conductivity and stability. Membrane structure is characterized by H NMR and FT-IR. Weight loss of the membrane in Fenton's reagent is not too high during the oxidative stability test. The thermal stability of the membrane is characterized by TGA and its morphology by SEM and SAXS. The prepared membranes improved proton conductivity up to 0.125 Scm which is much higher than that of Nafion N115 which is 0.059 Scm. Therefore, the SPEES-AM membranes are adequate for fuel cell at 50 °C with reduced relative humidity (RH).
本研究聚焦于与带有磺酸基团的脂肪族单体（2-丙烯酰胺基-2-甲基-1-丙烷磺酸；AMPS）相互连接/交联的芳香族聚合物（聚（1,4-亚苯基醚-醚砜）；SPEES），以提高其导电性，并通过AMPS的脂肪族链使其具有柔韧性。令人惊讶的是，在测量化学稳定性后，它的导电性高于其他已报道的研究。这使得能够通过定制的导电性和稳定性组合来优化聚合物电解质膜的合成。通过核磁共振氢谱（H NMR）和傅里叶变换红外光谱（FT-IR）对膜结构进行了表征。在氧化稳定性测试中，膜在芬顿试剂中的失重并不太高。通过热重分析（TGA）表征膜的热稳定性，通过扫描电子显微镜（SEM）和小角X射线散射（SAXS）表征其形态。制备的膜将质子传导率提高到了0.125 S/cm，远高于Nafion N115的0.059 S/cm。因此，SPEES-AM膜在50°C且相对湿度（RH）降低的条件下适用于燃料电池。
