Synthesis and Characterization of Partially Renewable Oleic Acid-Based Ionomers for Proton Exchange Membranes
| Autor: | Ismeli Alfonso, Carlos Corona-García, Araceli Martínez, Daniella Pacheco-Catalán, Joel Vargas, Arlette A. Santiago, Alejandro Onchi |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Condensation polymer Polymers and Plastics Proton exchange membrane fuel cell sulfonated polymer social sciences General Chemistry Polymer Article Dielectric spectroscopy lcsh:QD241-441 Oleic acid chemistry.chemical_compound Membrane Dicarboxylic acid stomatognathic system chemistry Chemical engineering lcsh:Organic chemistry oleic acid renewable ionomer metathesis Fourier transform infrared spectroscopy long-chain polyamide proton exchange membrane |
| Zdroj: | Polymers Polymers, Vol 13, Iss 130, p 130 (2021) Volume 13 Issue 1 |
| ISSN: | 2073-4360 |
| Popis: | The future availability of synthetic polymers is compromised due to the continuous depletion of fossil reserves thus, the quest for sustainable and eco-friendly specialty polymers is of the utmost importance to ensure our lifestyle. In this regard, this study reports on the use of oleic acid as a renewable source to develop new ionomers intended for proton exchange membranes. Firstly, the cross-metathesis of oleic acid was conducted to yield a renewable and unsaturated long-chain aliphatic dicarboxylic acid, which was further subjected to polycondensation reactions with two aromatic diamines, 4,4&prime (hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline and 4,4&prime diamino-2,2&prime stilbenedisulfonic acid, as comonomers for the synthesis of a series of partially renewable aromatic-aliphatic polyamides with an increasing degree of sulfonation (DS). The polymer chemical structures were confirmed by Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H, 13C, and 19F NMR) spectroscopy, which revealed that the DS was effectively tailored by adjusting the feed molar ratio of the diamines. Next, we performed a study involving the ion exchange capacity, the water uptake, and the proton conductivity in membranes prepared from these partially renewable long-chain polyamides, along with a thorough characterization of the thermomechanical and physical properties. The highest value of the proton conductivity determined by electrochemical impedance spectroscopy (EIS) was found to be 1.55 mS cm&minus 1 at 30 ° C after activation of the polymer membrane. |
| Databáze: | OpenAIRE |
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