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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2007,Vol.23>> Issue(08)>> 1235-1240     doi: 10.3866/PKU.WHXB20070818         中文摘要
Preparation and Properties of Proton Conducting Composite Membranes from Sulfonated Poly(phthalazinone ether keton) and Phosphotungstic Acid
DENG Hui-Ning; WANG Yu-Xin
Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
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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.

Keywords: Direct methanol fuel cell   Sulfonated poly(phthalazinone ether keton)   Phosphotungstic acid   Proton conductivity   Methanol permeability  
Received: 2007-02-28 Accepted: 2007-05-15 Publication Date (Web): 2007-06-19
Corresponding Authors: WANG Yu-Xin Email: yxwang@tju.edu.cn


Cite this article: DENG Hui-Ning; WANG Yu-Xin. Preparation and Properties of Proton Conducting Composite Membranes from Sulfonated Poly(phthalazinone ether keton) and Phosphotungstic Acid[J]. Acta Phys. -Chim. Sin., 2007,23 (08): 1235-1240.    doi: 10.3866/PKU.WHXB20070818
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