膜
质子交换膜燃料电池
材料科学
六氟丙烯
高分子化学
Nafion公司
化学工程
直接甲醇燃料电池
甲醇
聚合物混合物
甲醇燃料
乙醚
热稳定性
氟化物
傅里叶变换红外光谱
介电谱
聚合物
复合材料
化学
共聚物
有机化学
无机化学
电化学
物理化学
四氟乙烯
电极
工程类
阳极
生物化学
作者
A. Uma Devi,S. Neelakandan,A. Nagendran
摘要
ABSTRACT Proton exchange membranes (PEMs) based on blends of poly(ether sulfone) (PES) and sulfonated poly(vinylidene fluoride‐ co ‐hexafluoropropylene) (sPVdF‐ co ‐HFP) were prepared successfully. Fabricated blend membranes showed favorable PEM characteristics such as reduced methanol permeability, high selectivity, and improved mechanical integrity. Additionally, these membranes afford comparable proton conductivity, good oxidative stability, moderate ion exchange capacity, and reasonable water uptake. To appraise PEM performance, blend membranes were characterized using techniques such as Fourier transform infrared spectroscopy, AC impedance spectroscopy; atomic force microscopy, and thermogravimetry. Addition of hydrophobic PES confines the swelling of the PEM and increases the ultimate tensile strength of the membrane. Proton conductivities of the blend membranes are about 10 −3 S cm −1 . Methanol permeability of 1.22 × 10 −7 cm 2 s −1 exhibited by the sPVdF‐ co ‐HFP/PES10 blend membrane is much lower than that of Nafion‐117. AFM studies divulged that the sPVdF‐ co ‐HFP/PES blend membranes have nodule like structure, which confirms the presence of hydrophilic domain. The observed results demonstrated that the sPVdF‐ co ‐HFP/PES blend membranes have promise for possible usage as a PEM in direct methanol fuel cells. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43907.
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