The electric field effect on the nanostructure, transport, mechanical, and thermal properties of polymer electrolyte membrane

The electric field effect on the nanostructure, transport, mechanical, and thermal properties of polymer electrolyte membrane

In the present study, the effect of electric field on thermally treated Nafion 112 was investigated successfully. The electrically modified Nafion membranes were examined using various techniques such as Fourier transform infrared (FTIR), water uptake, wide-angle x-ray diffraction (WAXD), proton con...

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Bibliographic Details
Published in:Journal of polymer research Vol. 28; no. 6
Main Authors: Mohamed, Hamdy F. M., Hassanien, Mohamed H. M., Gomaa, Asmaa G. R., Aboud, Asmaa A. A., Ragab, Sara A. M., El-Gamal, Abdel-Rahman A. A., Saeed, Wessam R. M.
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-06-2021
Springer Nature B.V
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Degree of crystallinity
Electric field strength
Electric fields
Electrochemical analysis
Fourier transforms
Industrial Chemistry/Chemical Engineering
Infrared analysis
Infrared spectroscopy
Literature reviews
Membranes
Original Paper
Polymer Sciences
Positron annihilation
Protons
Tensile tests
Thermodynamic properties
Thermogravimetric analysis
Polymer electrolyte membrane
Electric field
Membrane characterizations
Nafion 112
Fuel cell
Positron annihilation lifetime
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Summary:In the present study, the effect of electric field on thermally treated Nafion 112 was investigated successfully. The electrically modified Nafion membranes were examined using various techniques such as Fourier transform infrared (FTIR), water uptake, wide-angle x-ray diffraction (WAXD), proton conductivity, thermogravimetric analysis (TGA), tensile test, and positron annihilation lifetime (PAL) spectroscopy. The FTIR patterns show that the chemical structure of the Nafion 112 is unchanged with the electric field. The electric field decreases the degree of crystallinity as deduced from WAXD. Furthermore, the hole volume size deduced from PAL measurement increases with increasing the electric field strengths. As a result of the electric field effect on the thermally treated Nafion 112 membrane, the electrochemical properties were enhanced. The proton conductivity increases from 1.0 × 10 –3 to 2.1 × 10 –3 S/m. The water uptake increases from 7.4 to 15.5% with increasing the electric field strength up to 80 MV/m and then it reaches a plateau. It was also found that the mechanical and thermal properties of thermally treated Nafion 112 were enhanced because of the electric field effect. The hole volume size was increased from 0.136 to 0.160 nm 3 as a function of the electric field. The results from different techniques were correlated successfully. The results were presented and discussed accordingly on a theoretical basis and compared to literature review data.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-021-02563-5