Photo-Cross-Linked Anion Exchange Membranes with Improved Water Management and Conductivity
| Autor: | Soenke Seifert, Tsung-Han Tsai, Wenxu Zhang, Andrew M. Herring, Himanshu N. Sarode, Ye Liu, E. Bryan Coughlin, S. Piril Ertem, Melissa M. Donahue |
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| Rok vydání: | 2015 |
| Předmět: |
Polymers and Plastics
Ion exchange Chemistry Organic Chemistry Inorganic chemistry Dithiol 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences Ion Inorganic Chemistry chemistry.chemical_compound Membrane Materials Chemistry medicine Copolymer 0210 nano-technology Ethylenedioxy medicine.drug |
| Zdroj: | Macromolecules. 49:153-161 |
| ISSN: | 1520-5835 0024-9297 |
| Popis: | Robust, cross-linked anion exchange membranes (AEMs) were prepared from solvent-processable polyisoprene-ran-poly(vinylbenzyltrimethylammonium chloride) (PI-ran-P[VBTMA][Cl]) ionomers via photoinitiated thiol–ene chemistry. Two series of membranes were prepared choosing two dithiol cross-linkers, 1,10-decanedithiol and 2,2′-(ethylenedioxy)diethanethiol, selected for their different hydrophobicities. A strong correlation was found between the choice of dithiol cross-linker, water uptake, morphology, and the ion conductivity of the membranes. Results were compared with previous findings of thermally cross-linked AEMs from analogous random copolymers. Comparably high chloride ion conductivities were obtained at low to moderate ion exchange capacities (IECs) with significantly low water uptake values. It was shown that by choosing a hydrophilic cross-linker ion cluster formation may be suppressed and ion conduction improved. This study highlights that it is possible to promote ion conductivities for low IEC m... |
| Databáze: | OpenAIRE |
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