Abstract To meet the increasing requirements of membrane humidification in proton exchange membrane fuel cells (PEMFCs), a series of montmorillonite (MMT)/PEBAX® 1074 mixed matrix membranes (MMMs) were fabricated using the solvent casting method. Pristine MMT and poly(oxyalkylene)amine (APOP)-modified MMT were added as the filler. Using the XRD, FT-IR, SEM, and TEM, the morphology and chemical structure of MMT during modification were investigated. Using the tests of water vapor permeability, air permeability, water contact angle, and crystallinity, the effects of montmorillonite on membrane properties were investigated. The results showed that surface hydrophilicity and crystallinity of MMMs increased as the MMT content increases, which leads to higher vapor permeability and selectivity than the pure PEBAX® 1074 membrane. After modification, APOP-MMT/PEBAX® 1074 MMMs showed better performance in vapor permeability and vapor/air selectivity. The best selectivity was 1.7 × 105, which is three times higher than that of pure PEBAX® 1074 membrane.

中文翻译：

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蒙脱石对用于质子交换膜燃料电池加湿器的基于 PEBAX® 1074 的混合基质膜的影响

摘要 为了满足质子交换膜燃料电池（PEMFCs）对膜增湿的要求，采用溶剂浇注法制备了一系列蒙脱石（MMT）/PEBAX® 1074混合基质膜（MMMs）。添加原始 MMT 和聚（氧化烯）胺（APOP）改性的 MMT 作为填料。使用 XRD、FT-IR、SEM 和 TEM，研究了改性过程中 MMT 的形貌和化学结构。通过透湿性、透气性、水接触角和结晶度的测试，研究了蒙脱石对膜性能的影响。结果表明，MMMs 的表面亲水性和结晶度随着 MMT 含量的增加而增加，这导致比纯 PEBAX® 1074 膜具有更高的蒸汽渗透性和选择性。修改后，APOP-MMT/PEBAX® 1074 MMM 在蒸汽渗透性和蒸汽/空气选择性方面表现出更好的性能。最佳选择性为 1.7 × 105，是纯 PEBAX® 1074 膜的三倍。