高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (7): 1598.

• 研究论文 • 上一篇    下一篇

用于燃料电池的季铵基团的PVA/PAADDA碱性聚合物电解质膜的制备及稳定性

傅婧1,乔锦丽2,马建新3   

  1. 1. 华东理工大学资源与环境工程学院, 上海 200237; 
    2. 东华大学环境科学与工程学院, 上海 201620; 
    3. 同济大学新能源汽车工程中心, 上海 201804
  • 收稿日期:2010-08-17 修回日期:2010-10-29 出版日期:2011-07-10 发布日期:2011-06-02
  • 通讯作者: 乔锦丽 E-mail:qiaojl@dhu.edu.cn
  • 基金资助:

    上海市浦江人才基金(批准号: 08PJ14096)、上海市自然科学基金(批准号: 09ZR1433300)和教育部归国留学人员基金[批准号: 2009(1001)]资助.

Preparation and Stability of Quaternary Ammonium Based Solid Alkaline Electrolyte Membrane for Fuel Cells

FU Jing1, QIAO Jin-Li2*, MA Jian-Xin3   

  1. 1. School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2. School of Environmental Science and Engineering, Donghua University, Shanghai 201260, China;
    3. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China
  • Received:2010-08-17 Revised:2010-10-29 Online:2011-07-10 Published:2011-06-02
  • Contact: Jin LiQIAO E-mail:qiaojl@dhu.edu.cn
  • Supported by:

    上海市浦江人才基金(批准号: 08PJ14096)、上海市自然科学基金(批准号: 09ZR1433300)和教育部归国留学人员基金[批准号: 2009(1001)]资助.

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被引次数

15

摘要： 通过聚合物共混法成功地制备出了具有化学交联结构的聚乙烯醇/二甲基二烯丙基氯化铵和丙烯酰胺共聚物(PVA/PAADDA)碱性聚合物电解质膜。采用傅里叶红外分析（FTIR）、扫描电镜（SEM）、热重分析（TGA）和交流阻抗等方法详细考察了PVA/PAADDA膜的分子结构、微观形貌、热稳定性、耐碱稳定性、尺寸稳定性和电导率。红外分析结果表明，PAADDA成功地混入聚合物基体中。SEM分析结果表明，当m(PVA):m(PAADDA)=1:1时，膜可观察到明显的微相分离。TGA结果表明，混入PAADDA后膜的热稳定性没有明显降低，并且在210 oC之前能保持很好的热稳定性。PVA/PAADDA膜在经过高温、高浓度碱溶液（80 oC, 6 mol?L-1）处理后，仍表现出很好的耐碱稳定性。同时，由于膜内形成致密的内互交联网络结构，PVA/PAADDA膜在60 oC水中处理300 h后也能表现出优良的尺寸稳定性和电导率稳定性。此外，膜的甲醇吸收率随着温度的升高没有明显变化，90 oC时甲醇吸收率仅为同条件下Nafion115膜的1/5。

关键词: 碱性聚合物电解质膜, 聚乙烯醇, 二甲基二烯丙基氯化铵和丙烯酰胺共聚物, 化学交联, 稳定性

Abstract: The solid alkaline electrolyte membranes have been succesfully prepared from poly(vinyl alcohol)/poly(acrylamide-co-diallyldimethylammonium chloride) (PVA/PAADDA) by chemical cross-linking. The molecular structure, morphology, thermal stability, alkali resistance durability, dimensional stability and conductivity of the PVA/PAADDA membranes were characterized using fourier transform infrared spectra (FTIR), scanning electron microscope (SEM), thermogravimetric analysis (TGA) and alternating current impedance technique. FTIR results indicated that PAADDA was successfully blended in the polymer matrix. The phase separation of the PVA/PAADDA membrane in 1:1 mass ratio was observed by SEM. From the TGA, the increasing content of PAADDA into polymer matrics has little effect on the thermal stability and, the good thermal stability around 210 oC was obtained . The membranes showed perfect alkali resistance durability even conditioned at elevated temperatures and high concentration of KOH (80 oC, 6 mol?L-1). Meanwhile, the PVA/PAADDA membrane exhibited good dimensional and conductivity stability towarded water at 60 oC after 300 h due to its dense semi-interpenetrating networks in polymer matrics. In addition, the methanol uptake of the PVA/PAADDA membrane showed almost no changes after conditioned at elevated temperatures and, were 5 times lower than that of Nafion115 membrane after conditioned at 90 oC.

Key words: Solid alkaline electrolyte membranes, Poly(vinyl alcohol), Poly(acrylamide-co- diallyldimethylammonium chloride), chemical cross-linking, stability

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