Department of Chemical & Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
J Colloid Interface Sci. 2012 Sep 1;381(1):59-66. doi: 10.1016/j.jcis.2012.05.043. Epub 2012 May 31.
A series of novel fluoropolymer anion exchange membranes based on the copolymer of vinylbenzyl chloride, butyl methacrylate, and hexafluorobutyl methacrylate has been prepared. Fourier transform infrared (FT-IR) spectroscopy and elemental analysis techniques are used to study the chemical structure and chemical composition of the membranes. The water uptake, ion-exchange capacity (IEC), conductivity, methanol permeability, and chemical stability of the membranes are also determined. The membranes exhibit high anionic conductivity in deionized water at 65 °C ranging from 3.86×10(-2) S cm(-1) to 4.36×10(-2) S cm(-1). The methanol permeability coefficients of the membranes are in the range of 4.21-5.80×10(-8) cm(2) s(-1) at 65 °C. The novel membranes also show good chemical and thermal stability. An open-circuit voltage of 0.7 V and a maximum power density of 53.2 mW cm(-2) of alkaline direct methanol fuel cell (ADMFC) with the membrane C, 1 M methanol, 1 M NaOH, and humidified oxygen are achieved at 65 °C. Therefore, these membranes have great potential for applications in fuel cell systems.
已制备了一系列基于氯甲基苯乙烯、甲基丙烯酸丁酯和六氟丁基甲基丙烯酸酯共聚物的新型氟聚合物阴离子交换膜。傅里叶变换红外（FT-IR）光谱和元素分析技术用于研究膜的化学结构和化学成分。还测定了膜的吸水率、离子交换容量（IEC）、电导率、甲醇渗透率和化学稳定性。在 65°C 的去离子水中，这些膜在 65°C 时表现出高的阴离子电导率，范围从 3.86×10(-2) S cm(-1)到 4.36×10(-2) S cm(-1)。在 65°C 时，膜的甲醇渗透率系数在 4.21-5.80×10(-8) cm(2) s(-1)范围内。新型膜还表现出良好的化学和热稳定性。在 65°C 时，用膜 C、1 M 甲醇、1 M NaOH 和加湿氧气的碱性直接甲醇燃料电池（ADMFC）可达到 0.7 V 的开路电压和 53.2 mW cm(-2) 的最大功率密度。因此，这些膜在燃料电池系统中有很大的应用潜力。
