Preparation and properties of medium temperature membranes based on zirconium sulfophenylphosphate/sulfonated poly(phthalazinone ether sulfone ketone) for direct methanol fuel cells
Preparation and properties of medium temperature membranes based on zirconium sulfophenylphosphate/sulfonated poly(phthalazinone ether sulfone ketone) for direct methanol fuel cells
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直接甲醇燃料电池用磺基苯基磷酸锆/磺化聚二氮杂萘酮醚砜酮中温膜的制备及性能
DOI：
10.1016/j.memsci.2010.01.027
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发表时间：
2010-04
影响因子：
9.5
通讯作者：
Wang, Suwen
中科院分区：
文献类型：
--
作者：
Yu, Xianjin;Li, Zhongfang;Xu, Lijuan;Dong, Feilong;Wang, Suwen
采用溶液浇铸法制备了磺化聚芳醚砜酮（SPPESK）与无机有机磺酸苯磷酸锆（ZrSPP）的新型高分子复合膜。使用三种ZrSPP浓度：10、20和30重量%。磺化度分别为34.6%和76%。ZrSPP的取代度为95%。采用红外光谱（IR）、X射线衍射（XRD）、热重分析（TGA）、扫描电子显微镜（SEM）和X射线能谱（EDX）对膜进行了表征。IR结果表明ZrSPP与SPPESK分子之间形成了强烈的氢键。SEM照片显示ZrSPP与SPPESK混合均匀，形成致密结构。10wt%SPPESK（DS 76%）/ZrSPP复合膜在120°C下的质子电导率达到0.393S/cm，30wt%SPPESK（DS 34.6%）/ZrSPP复合膜在160°C和100%相对湿度（RH）下的质子电导率达到0.23S/cm。在80-160°C的温度范围内，SPPESK/ZrSPP复合膜的质子传导性优于Nafion®117膜。SPPESK/ZrSPP复合膜的甲醇渗透率在1.9×10− 8 ~ 0.15×10− 8 cm 2/s之间，远低于Nafion®117的甲醇渗透率（2.4×10− 6cm 2/s）。该复合膜具有良好的热稳定性、质子传导性和耐甲醇性能。
Novel polymer composite membranes composed of sulfonated poly(phthalazinone ether sulfone ketone) (SPPESK) and inorgano-organic zirconium sulfophenyl phosphate (ZrSPP) were prepared by solution casting. Three ZrSPP concentrations were used: 10, 20 and 30wt%. The degrees of sulfonation (DS) of SPPESK were 34.6% and 76%. The DS of ZrSPP was 95%. Membranes were characterized by infrared spectroscopy (IR), X-ray diffraction spectroscopy (XRD), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). IR results indicated intense hydrogen bonds formed between ZrSPP and SPPESK molecules. SEM micrographs showed that ZrSPP mixed well with SPPESK and formed dense structures. The proton conductivity of the 10wt% SPPESK (DS 76%)/ZrSPP composite membrane reached 0.393S/cm at 120°C and that of the 30wt% of SPPESK (DS 34.6%)/ZrSPP composite membrane reached 0.23S/cm at 160°C and 100% relative humidity (RH). Proton conductivities of the SPPESK/ZrSPP composite membranes were better than that of the Nafion®117 membrane in the temperature range of 80–160°C. The methanol permeabilities of the SPPESK/ZrSPP composite membranes were in the range of 1.9×10−8to 0.15×10−8cm2/s, much lower than that of Nafion®117 (2.4×10−6cm2/s). The composite membranes exhibited good thermal stabilities, proton conductivities, and good methanol resistance properties.
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