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http://cicy.repositorioinstitucional.mx/jspui/handle/1003/1721| Effect of sulfonic groups concentration on IEC properties in new fluorinated copolyamides | |
| RAMON DEL JESUS PALI CASANOVA Marcial Alfredo Yam Cervantes JOSE DEL CARMEN ZAVALA LORIA María Isabel de los Dolores Loría Bastarrachea Manuel de Jesús Aguilar Vega LUIS ALONSO DZUL LOPEZ MARIA LUISA SAMANO CELORIO Jorge Crespo Álvarez Eduardo García Villena Pablo Agudo Toyos Francisco Méndez Martínez | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| https://doi.org/10.3390/polym11071169 | |
| POLYAMIDES SULFONATION ION EXCHANGE CAPACITY PROTON CONDUCTIVITY | |
| Seven aromatic polyamides and copolyamides were synthesized from two different aromatic diamines: 4,4′-(Hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline (HFDA) and 2,4-Aminobenzenesulfonic acid (DABS). The synthesis was carried out by polycondensation using isophthaloyl dichloride (1SO). The effect of an increasing molar concentration of the sulfonated groups, from DABS, in the copolymer properties was evaluated. Inherent viscosity tests were carried out to estimate molecular weights. Mechanical tests were carried out under tension, maximum strength ( σ max), Young’s modulus (E), and elongation at break (εmax) to determine their mechanical properties. Tests for water sorption and ion exchange capacity (IEC) were carried out. Proton conductivity was measured using electrochemical impedance spectroscopy (EIS). The results indicate that as the degree of sulfonation increase, the greater the proton conductivity. The results obtained showed conductivity values lower than the commercial membrane Nafion 115 of 0.0065 S cm−1. The membrane from copolyamide HFDA/DABS/1S0-70/30 with 30 mol DABS obtained the best IEC, with a value of 0.747 mmol g−1 that resulted in a conductivity of 2.7018 × 10−4 S cm−1, lower than the data reported for the commercial membrane Nafion 115. According to the results obtained, we can suggest that further developments increasing IEC will render membranes based on aromatic polyamides that are suitable for their use in PEM fuel cells. | |
| 2019 | |
| Artículo | |
| Polymers, 11(7), 1169, 2019 | |
| Inglés | |
| Pali-Casanova, R. D. J., Yam-Cervantes, M. A., Loría-Bastarrachea, M. I., Aguilar-Vega, M. D. J., Dzul-López, L. A., Sámano-Celorio, M. L., ... & Méndez-Martínez, F. (2019). Effect of Sulfonic Groups Concentration on IEC Properties in New Fluorinated Copolyamides. Polymers, 11(7), 1169 | |
| PROPIEDADES DE LOS MATERIALES | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos de Investigación Arbitrados |
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