Anion Conductive Aromatic Copolymers from Dimethylaminomethylated Monomers: Synthesis, Properties, and Applications in Alkaline Fuel Cells
| Autor: | Ryo Akiyama, Koichiro Asazawa, Eriko Nishino, Naoki Yokota, Kenji Miyatake |
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| Rok vydání: | 2016 |
| Předmět: |
Alkaline fuel cell
Polymers and Plastics Ion exchange Chemistry Organic Chemistry Arylene 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Membrane Polymerization Phenylene Polymer chemistry Materials Chemistry Copolymer Hydroxide 0210 nano-technology |
| Zdroj: | Macromolecules. 49:4480-4489 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/acs.macromol.6b00408 |
| Popis: | A novel series of anion conductive aromatic copolymers were synthesized from preaminated monomers (2,5-, 3,5-, or 2,4-dichloro-N,N-dimethylbenzylamine), and their properties were investigated for alkaline fuel cell applications. The targeted copolymers (QPE-bl-11a, -11b, and -11c) were synthesized via nickel-mediated Ullmann coupling polymerization, followed by quaternization and ion exchange reactions. Unlike the conventional method involving chloromethylation or bromination, this method provided copolymers with well-defined chemical structure. The hydrophilic components of the copolymers were composed of chemically stable phenylene main chain modified with high-density ammonium groups. Oligo(arylene ether sulfone ketone)s were employed as a hydrophobic block. QPE-bl-11a gave tough and bendable membranes by solution casting. The obtained membrane with the highest ion exchange capacity value (IEC = 2.47 mequiv g–1) showed high hydroxide ion conductivity (130 mS cm–1) in water at 80 °C. The QPE-bl-11a memb... |
| Databáze: | OpenAIRE |
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