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首页> 美国卫生研究院文献>Membranes >Transport Properties and Mechanical Features of Sulfonated Polyether Ether Ketone/Organosilica Layered Materials Nanocomposite Membranes for Fuel Cell Applications
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Transport Properties and Mechanical Features of Sulfonated Polyether Ether Ketone/Organosilica Layered Materials Nanocomposite Membranes for Fuel Cell Applications

机译：燃料电池用磺化聚醚醚酮/有机硅层状材料纳米复合膜的输运性能和力学性能

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摘要

In this work, we study the preparation of new sulfonated polyether ether ketone (sPEEK) nanocomposite membranes, containing highly ionic silica layered nanoadditives, as a low cost and efficient proton exchange membranes for fuel cell applications. To achieve the best compromise among mechanical strength, dimensional stability and proton conductivity, sPEEK polymers with different sulfonation degree (DS) were examined. Silica nanoplatelets, decorated with a plethora of sulfonic acid groups, were synthesized through the one-step process, and composite membranes at 1, 3 and 5 wt% of filler loadings were prepared by a simple casting procedure. The presence of ionic layered additives improves the mechanical strength, the water retention capacity and the transport properties remarkably. The nanocomposite membrane with 5% wt of nanoadditive exhibited an improvement of tensile strength almost 160% (68.32 MPa,) with respect to pristine sPEEK and a ten-times higher rate of proton conductivity (12.8 mS cm ) under very harsh operative conditions (i.e., 90 °C and 30% RH), compared to a filler-free membrane. These findings represent a significant advance as a polymer electrolyte or a fuel cell application.
机译：在这项工作中，我们研究了新型的磺化聚醚醚酮（sPEEK）纳米复合膜的制备，该膜包含高离子化二氧化硅层状纳米添加剂，可作为低成本高效的质子交换膜用于燃料电池。为了在机械强度，尺寸稳定性和质子传导性之间取得最佳折衷，研究了具有不同磺化度（DS）的sPEEK聚合物。通过一步法合成了装饰有大量磺酸基团的二氧化硅纳米片，并通过简单的浇铸程序制备了填充量分别为1、3和5 wt％的复合膜。离子层状添加剂的存在显着提高了机械强度，保水能力和运输性能。相对于原始的sPEEK，具有5％wt的纳米添加剂的纳米复合膜表现出的拉伸强度几乎提高了160％（68.32 MPa），质子传导率（12.8 mS cm）的提高速率是十分苛刻的条件下（即10倍） ，90°C和30％RH），而无填料膜则更是如此。这些发现代表了作为聚合物电解质或燃料电池应用的重大进展。

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