Department of Polymer Science and Engineering, School of Materials Science and Engineering, Gyeongsang National University, Jinju 52828, Republic of Korea.
Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Republic of Korea.
Int J Biol Macromol. 2024 Mar;262(Pt 2):129979. doi: 10.1016/j.ijbiomac.2024.129979. Epub 2024 Feb 6.
In this study, 1-bromohexyl-1methylpiperidinium bromide (Br-6-MPRD) ionic liquid grafted quaternized chitosan (QCS) and polyvinyl alcohol (PVA) blends were composited with glycidyl trimethyl ammonium chloride (GTMAC) quaternized silica (QSiO) at different dosages. Glutaraldehyde (GA) crosslinked the membranes and then processed into hydroxide form with an aqueous potassium hydroxide solution. The resultant IL-QCS/PVA/QSiO membranes exhibit significantly improved ionic conductivity, moderate water absorption and swelling ratio compared with the pristine IL-QCS/PVA anion exchange membrane (AEM). Among them, the hydroxide ion conductivity and power density of IL-QCS/PVA/QSiO-7 membrane can reach up to 78 mS cm at 80 °C and 115 mW cm at 60 °C respectively. In addition, IL-QCS/PVA/QSiO membranes have excellent thermal, mechanical, and chemical stabilities, which can meet the application requirements of AEM for fuel cells.
在这项研究中，溴己基-1-甲基哌啶溴化物（Br-6-MPRD）离子液体接枝季铵化壳聚糖（QCS）和聚乙烯醇（PVA）共混物与氯化三甲铵基硅烷（GTMAC-QSiO）在不同剂量下进行复合。戊二醛（GA）交联膜，然后用氢氧化钾水溶液处理成氢氧化物形式。与原始的 IL-QCS/PVA 阴离子交换膜（AEM）相比，所得 IL-QCS/PVA/QSiO 膜表现出显著提高的离子电导率、适度的吸水率和溶胀比。其中，IL-QCS/PVA/QSiO-7 膜的氢氧化物离子电导率和功率密度在 80°C 时分别高达 78 mS cm 和在 60°C 时为 115 mW cm。此外，IL-QCS/PVA/QSiO 膜具有优异的热稳定性、机械稳定性和化学稳定性，能够满足燃料电池用 AEM 的应用要求。
