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Synthesis and characterization of novel acid-base polymer blends for application in membrane fuel cells

机译：应用于膜燃料电池的新型酸碱聚合物共混物的合成与表征

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摘要

In this contribution novel acid-base polymer blend membranes are introduced. The membranes are composed of sulfonated poly(etheretherketone) sPEEK Victrex or poly(ethersulfone) sPSU Udel as the acidic compounds, and of PSU Udel diaminated at the ortho position to the sulfone bridge, or poly(4-vinylpyridine), poly(benzimidazole) PBI CELAZOLE, or poly(ethyleneimine) PEI (Aldrich) as the basic compounds. The membranes showed good proton conductivities at ion-exchange capacities IEC of 1 (IEC = meq SO_3H/g dry membrane), and they showed excellent thermal stabilities (decomposition temperatures >270 °C). Two of the membranes were tested in a H_2 membrane fuel cell and showed good performance. The specific interaction of the SO_3H groups and of the basic N groups was investigated via FTIR for the sulfonated PSU/diaminated PSU and for the sulfonated PSU/poly(4-vinylpyridine) (Pyr) blend. It could be proved that in the dry membranes polysalt groups exist formed by the following acid-base reaction: PSU-SO_3H+H_2N-PSU->[PSU-SO_3]< sup>- ~+[H_3N-PSU], and PSU-SO_3H+P->[PSU-SO_3]~- +[H-Pyr].
机译：在这一贡献中，引入了新型的酸基聚合物共混膜。膜由作为酸性化合物的磺化聚醚醚酮sPEEK Victrex或聚醚醚sPSU Udel组成，以及在砜桥的邻位进行过正电化的PSU Udel或聚（4-乙烯基吡啶），聚苯并咪唑PBI CELAZOLE或聚（乙烯亚胺）PEI（Aldrich）作为碱性化合物。该膜在离子交换容量IEC为1（IEC = meq SO_3H / g干膜）下显示出良好的质子电导率，并且表现出出色的热稳定性（分解温度> 270°C）。其中两个膜在H_2膜燃料电池中进行了测试，并显示出良好的性能。通过FTIR研究了磺化的PSU /重氮化的PSU和磺化的PSU /聚（4-乙烯基吡啶）（Pyr）共混物的SO_3H基团和碱性N基团的特定相互作用。可以证明在干膜中通过以下酸碱反应形成了多盐基团：PSU-SO_3H + H_2N-PSU-> [PSU-SO_3] -〜+ [H_3N-PSU]，和PSU- SO_3H + P-> [PSU-SO_3]〜-+ [H-Pyr]。

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