Preparation and properties of phosphorylated and crosslinked poly(vinyl alcohol)/bisphenol A–epoxy resin membranes for fuel cell applications

Authors

  • Yuan Yuan,

    1. Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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  • Jianhong Liu,

    1. College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
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  • Cuihua Li,

    1. College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
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  • Jianhua Fang,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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  • Shushan Wang,

    1. Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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  • Rong Guan

    Corresponding author
    1. Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
    • Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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Abstract

To overcome the strong dependence of the conductivity on the relative humidity and the lower thermal stability at high temperature of perfluorosulfonate polymers and the leaching-out problem of phosphoric acid doped membranes, a series of phosphorylated and crosslinked poly(vinyl alcohol) (PVA)/bisphenol A–epoxy resin [diglycidyl ether of bisphenol A (DGEBA)] membranes were prepared. The membrane properties were characterized by Fourier transform infrared spectra, solubility, thermogravimetric analysis, water uptake, swelling ratio, ion-exchange capacity (IEC), small-angle X-ray scattering, and proton conductivity measurements. The results show that the crosslinked PVA/DGEBA membrane had a higher thermal stability (Td ≥ 250°C) than the pure PVA membrane (Td ≥ 220°C) and that the phosphorylated and crosslinked PVA/DGEBA membranes (IEC = 5.54 mmol/g) with a low volume swelling ratio (7.21%) could achieve a maximum proton conductivity of 2.51 × 10−3 S/cm at a temperature as high as 150°C in anhydrous conditions © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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