物理化学学报 >> 2007, Vol. 23 >> Issue (08): 1235-1240.doi: 10.3866/PKU.WHXB20070818

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磷钨酸/磺化杂萘联苯聚醚酮复合质子交换膜的制备及其性能

邓会宁; 王宇新   

  1. 天津大学化工学院, 化学工程研究所, 天津 300072
  • 收稿日期:2007-02-28 修回日期:2007-05-15 发布日期:2007-08-03
  • 通讯作者: 王宇新 E-mail:yxwang@tju.edu.cn

Preparation and Properties of Proton Conducting Composite Membranes from Sulfonated Poly(phthalazinone ether keton) and Phosphotungstic Acid

DENG Hui-Ning; WANG Yu-Xin   

  1. Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
  • Received:2007-02-28 Revised:2007-05-15 Published:2007-08-03
  • Contact: WANG Yu-Xin E-mail:yxwang@tju.edu.cn

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摘要： 制备了基于磷钨酸(PWA)与磺化杂萘联苯聚醚酮(SPPEK)的无机-有机复合质子交换膜, 红外光谱测试结果表明, 复合膜中PWA通过端氧和桥氧共同与SPPEK发生作用; 由SEM照片看出, 对磺化度为58%的SPPEK, PWA掺杂量为20%和40%时杂多酸的分散良好, 掺杂量为60%时膜内出现颗粒聚集; PWA在水中的溶出性测试发现, 用水处理4天, 各复合膜中PWA的溶出率均低于10%; PWA/SPPEK膜具有良好的质子导电性, PWA掺杂量高于40%、磺化度为58%的SPPEK为基质的复合膜在100 ℃以上的电导率接近甚至超过Nafion115膜的电导率, 复合膜的电导率和水含量均随PWA掺杂量的增加而增加; 随着PWA掺杂量的增加复合膜的阻醇性能下降, 但除PWA掺杂量60%、SPPEK磺化度58%的复合膜外, 所制备的多种复合膜的甲醇透过系数均低于Nafion115膜.

关键词: 直接甲醇燃料电池, 磺化杂萘联苯聚醚酮, 磷钨酸, 质子导电性, 甲醇透过性

Abstract: A novel inorganic-organic composite membrane based on sulfonated poly(phthalazinone ether keton) (SPPEK) with embedded phosphotungstic acid (PWA) was prepared. IR spectra results indicated that both the bridging oxygen and the terminal oxygen of PWA interacted with SPPEK. PWAwas well dispersed in the membranes with 20% and 40% PWA in SPPEK of 58% sulfonation degree as shown in SEM pictures. But conglomeration was found in the SEM picture of composite membrane with 60% PWA. After treated in water for four days, less than 10% PWA was extracted from the composite membranes. With the increment of PWA content, the conductivity, water content, and methanol permeability of the PWA/SPPEK composite membranes were all increased. The composite membranes with PWA content higher than 40% and SPPEK of 58% sulfonation degree have conductivity similar or superior to that of Nafion115 membrane at temperature higher than 100 ℃. Methanol permeability of the PWA/SPPEK composite membranes was lower than that of Nafion115 membrane except the composite membrane with 60%PWA in SPPEK of 58%sulfonation degree.

Key words: Direct methanol fuel cell, Sulfonated poly(phthalazinone ether keton), Phosphotungstic acid, Proton conductivity, Methanol permeability

MSC2000: 

  • O646