Kulasekaran Poonkuzhali, Maria Mahimai Berlina, Deivanayagam Paradesi
Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology Kattankulathur Tamil Nadu India
RSC Adv. 2020 Jul 14;10(44):26521-26527. doi: 10.1039/d0ra04360e. eCollection 2020 Jul 9.
Herein, a new series of polymer electrolyte membranes was prepared by chemically cross-linked poly(vinyl alcohol) (PVA) and sulfonated poly(ether sulfone) (SPES). A typical polymerization reaction was conducted using three different monomers bisphenol A, phenolphthalein, and 4,4'-dichlorodiphenyl sulfone. The SPES polymer was obtained by the post-sulfonation technique using chlorosulfonic acid as a sulfonating agent. The resultant SPES polymer at different concentrations was blended with cross-linked poly(vinyl alcohol). Structural analysis of the samples was conducted by FTIR, SEM, and XRD. Among the prepared PEM materials, PVA-SPES-20 blend membranes exhibited higher ion-exchange capacity and % water uptake values than those of the other membranes. In addition, the PVA-SPES-20 membrane exhibits the proton conductivity of 0.0367 S cm at 30 °C, whereas pristine PVA shows the proton conductivity of 0.0259 S cm. The overall experimental results revealed that the PVA-SPES blend membranes are promising candidates for fuel cell applications.
在此，通过化学交联的聚乙烯醇（PVA）和磺化聚醚砜（SPES）制备了一系列新型聚合物电解质膜。使用三种不同的单体双酚A、酚酞和4,4'-二氯二苯砜进行典型的聚合反应。通过使用氯磺酸作为磺化剂的后磺化技术获得SPES聚合物。将不同浓度的所得SPES聚合物与交联聚乙烯醇共混。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和X射线衍射（XRD）对样品进行结构分析。在所制备的质子交换膜材料中，PVA-SPES-20共混膜表现出比其他膜更高的离子交换容量和吸水率。此外，PVA-SPES-20膜在30℃时的质子传导率为0.0367 S/cm，而原始PVA的质子传导率为0.0259 S/cm。总体实验结果表明，PVA-SPES共混膜是燃料电池应用的有前景的候选材料。
