Effect of sulfonic groups concentration on IEC properties in new fluorinated copolyamides

dc.creatorRAMON DEL JESUS PALI CASANOVA
dc.creatorMarcial Alfredo Yam Cervantes
dc.creatorJOSE DEL CARMEN ZAVALA LORIA
dc.creatorMaría Isabel de los Dolores Loría Bastarrachea
dc.creatorManuel de Jesús Aguilar Vega
dc.creatorLUIS ALONSO DZUL LOPEZ
dc.creatorMARIA LUISA SAMANO CELORIO
dc.creatorJorge Crespo Álvarez
dc.creatorEduardo García Villena
dc.creatorPablo Agudo Toyos
dc.creatorFrancisco Méndez Martínez
dc.date2019
dc.date.accessioned2023-07-21T19:19:00Z
dc.date.available2023-07-21T19:19:00Z
dc.identifierhttp://cicy.repositorioinstitucional.mx/jspui/handle/1003/1721
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7737276
dc.descriptionSeven 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.
dc.formatapplication/pdf
dc.languageeng
dc.relationinfo:eu-repo/semantics/datasetDOI/https://doi.org/10.3390/polym11071169
dc.relationcitation: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
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourcePolymers, 11(7), 1169, 2019
dc.subjectinfo:eu-repo/classification/Autores/POLYAMIDES
dc.subjectinfo:eu-repo/classification/Autores/SULFONATION
dc.subjectinfo:eu-repo/classification/Autores/ION EXCHANGE CAPACITY
dc.subjectinfo:eu-repo/classification/Autores/PROTON CONDUCTIVITY
dc.subjectinfo:eu-repo/classification/cti/7
dc.subjectinfo:eu-repo/classification/cti/33
dc.subjectinfo:eu-repo/classification/cti/3312
dc.subjectinfo:eu-repo/classification/cti/331208
dc.subjectinfo:eu-repo/classification/cti/331208
dc.titleEffect of sulfonic groups concentration on IEC properties in new fluorinated copolyamides
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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