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首页> 外文期刊>Journal of Applied Polymer Science >Performance of the sulfonated poly ether ether ketone proton exchange membrane modified with sulfonated polystyrene and phosphotungstic acid for microbial fuel cell applications
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Performance of the sulfonated poly ether ether ketone proton exchange membrane modified with sulfonated polystyrene and phosphotungstic acid for microbial fuel cell applications

机译：用磺化聚苯乙烯和微生物燃料电池应用的磺化聚苯醚醚酮改性磺化聚醚醚酮质子交换膜的性能

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摘要

In this research, the preparation of low cost proton exchange membranes (PEMs) based on sulfonated poly ether ether ketone (SPEEK) for application in the microbial fuel cells (MFCs) is studied. Sulfonated polystyrene (SPS) and phosphotungstic acid (PWA) were employed to improve the performance of PEM through the creation of more proton pathways. At first, the sulfonation of PEEK and polystyrene were performed through two modified methods to obtain uniform and high degree of sulfonation (DS) of the polymers and then, the PEMs were prepared through the solution casting method. Accordingly, the formation of uniform skin layer was confirmed by the SEM micrographs. Blending the aforementioned additives to the SPEEK polymer solution significantly enhanced the proton conductivity, water uptake and durability of the modified membranes. The proton conductivities of SPEEK/SPS and SPEEK/PWA membranes at additive/SPEEK weight ratio of 0.15 were 45.3% and 26.2% higher than that of the commercial Nafion117 membrane, respectively. Moreover, the degradation times for the abovementioned modified membranes were 140 and 350 min which indicated satisfactory oxidation stability. Besides, the aforementioned membranes exhibited two times more water uptake compared to the neat SPEEK membrane. Finally, SPEEK/SPS and SPEEK/PWA membranes produced 68% and 36% higher maximum power in the MFC, compared to the commercial Nafion117 membrane. Therefore, the fabricated PEMs are potentially suitable alternatives to be used in the fuel cell applications.
机译：本研究以磺化聚醚醚酮（SPEEK）为基础，制备了用于微生物燃料电池（MFC）的低成本质子交换膜（PEM）。磺化聚苯乙烯（SPS）和磷钨酸（PWA）通过创造更多质子通道来改善质子交换膜的性能。首先，通过两种改性方法对PEEK和聚苯乙烯进行磺化，以获得均匀且高度磺化的聚合物，然后通过溶液浇铸法制备PEMs。因此，SEM显微照片证实了均匀表皮层的形成。将上述添加剂与SPEEK聚合物溶液混合，可显著提高改性膜的质子导电性、吸水率和耐久性。SPEEK/SPS和SPEEK/PWA膜在添加剂/SPEEK重量比为0.15时的质子电导率分别比商品Nafion117膜高45.3%和26.2%。此外，上述改性膜的降解时间分别为140和350分钟，这表明其具有良好的氧化稳定性。此外，上述膜的吸水率是纯SPEEK膜的两倍。最后，与市售Nafion117膜相比，SPEEK/SPS和SPEEK/PWA膜在MFC中产生的最大功率分别高出68%和36%。因此，所制备的质子交换膜是燃料电池应用中潜在的合适替代品。

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