A new synthesis approach for proton exchange membranes based on ultra‐high‐molecular‐weight polyethylene,Journal of Applied Polymer Science

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A new synthesis approach for proton exchange membranes based on ultra‐high‐molecular‐weight polyethylene
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-07-12 , DOI: 10.1002/app.49563
Ardalion N. Ponomarev _{1,

2} , Dina A. Kritskaya _{1,

2} , Emil F. Abdrashitov ₁ , Veslav C. Bokun ₁ , Evgeny A. Sanginov _{2,

3} , Ksenia S. Novikova _{2,

3} , Nadezhda N. Dremova ₂ , Yury A. Dobrovolsky _{2,

3}

Affiliation

A new approach for gas‐phase modification of ultra‐high‐molecular‐weight polyethylene (UHMWPE) film for synthesis of proton exchange membranes (PEMs) has been successfully realized. First, the membrane precursors have been prepared by soaking the films in a monomers/AIBN solution followed by their modification with polystyrene (PS) in styrene vapor at 110°C. The developed method is characterized by high efficiency, simplicity, and ecological purity. The modified UHMWPE films containing up to 60 wt% of PS have been obtained. Then, PEMs were prepared by sulfonation of these precursors. According to energy‐dispersive X‐ray spectroscopy of the sulfonated samples, almost uniform distribution of PS through the film thickness was observed. The membranes with an ion exchange capacity up to 2.7 mmol/g and proton conductivity up to 60 mS/cm (water, 25°C) were obtained. Comparative tests of the obtained UHMWPE‐sulfonated PS and commercial Nafion‐115 membranes in a hydrogen–air fuel cell have been carried out. It has been shown that the cell with the synthesized membranes exhibits better performance than that with Nafion‐115.

中文翻译：

基于超高分子量聚乙烯的质子交换膜合成新方法

已经成功地实现了一种气相改性超高分子量聚乙烯（UHMWPE）膜以合成质子交换膜（PEM）的新方法。首先，通过将膜浸泡在单体/ AIBN溶液中，然后在110℃下在苯乙烯蒸汽中用聚苯乙烯（PS）对其进行改性，来制备膜前体。该方法具有高效，简便，生态纯净的特点。已经获得了包含高达60wt％的PS的改性的UHMWPE膜。然后，通过磺化这些前体制备PEM。根据磺化样品的能量色散X射线光谱学，观察到PS在整个膜厚度中几乎均匀分布。膜的离子交换容量高达2.7 mmol / g，质子传导率高达60 mS / cm（水，获得25℃）。在氢气-空气燃料电池中对获得的UHMWPE磺化的PS和商用Nafion-115膜进行了对比测试。结果表明，具有合成膜的电池比Nafion-115具有更好的性能。

更新日期：2020-09-13

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