中国塑料

中国塑料 ›› 2014, Vol. 28 ›› Issue (06): 69-72 .DOI: 10.19491/j.issn.1001-9278.2014.06.011

• 材料与性能 • 上一篇    下一篇

再铸全氟磺酸-聚四氟乙烯共聚物/磺化氧化锆复合膜的制备与性能研究

侯宏英1,孟瑞晋1,高妍2   

  1. 1. 昆明理工大学2. 大连市金州新区价格认证中心
  • 收稿日期:2014-01-15 修回日期:2014-03-16 出版日期:2014-06-26 发布日期:2014-06-26

Synthesis and Properties of Recast Perfluorosulfonic Acid-PTFE Copolymer/Sulfated Zirconia Composite Membrane

  • Received:2014-01-15 Revised:2014-03-16 Online:2014-06-26 Published:2014-06-26

摘要： 利用溶液再铸法制备了全氟磺酸－聚四氟乙烯共聚物 （Nafion?）/磺化氧化锆（SZ）复合膜，借助X射线衍射、扫描电子显微镜、热失重分析仪等研究了所制备复合膜的微观结构、形貌以及性能。结果表明，棒状SZ颗粒以平行于膜表面的方向排列，均匀分布在Nafion?膜的骨架中，改善了膜在中温区的热稳定性；将复合膜用于直接甲醇燃料电池（DMFC）的电解质膜时，使用了3 ％ 和6 ％SZ的Nafion?/SZ复合膜的DMFC在45 ℃和5 mol/L甲醇进料时的峰值输出功率密度分别为46.27、59.47 mW/cm2，明显高于同样条件下Nafion?膜的38.2 mW/cm2。

关键词: 全氟磺酸-聚四氟乙烯共聚物, 磺化氧化锆, 溶液再铸, 复合膜, 直接甲醇燃料电池

Abstract: Composite membranes consisting of sulfated zirconia（SZ）and perfluorosulfonic acid-PTFE copolymer（Nafion?）were prepared by solution recasting. The microstructure, morphology, and properties of as-synthesized composite membrane were studiedd by XRD, SEM, and TGA. It showed that rod-like SZ particles were evenly distributed in Nafion? membrane matrix, and slightly modified the thermal stability at medium temperature range. Under the conditions of 45 ℃ and 5 mol/L methanol, the peak power densities of direct methanol fuel cell（DMFC）with 3 % and 6 % Nafion?/SZ composite membranes were 46.27 mW/cm2 and 59.47 mW/cm2, respectively, higher than that of DMFC with pristine Nafion? menbrane.

Key words: perfluorosulfonic acid-polytetrafluoroethene copolymer, sulfated zirconia, solution recasting, composite membrane, direct methanol fuel cell

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