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Phase Separated Methylated Polybenzimidazole (O-PBI) Based Anion Exchange Membranes
- Authors
- Germer, Wiebke; Leppin, Janine; Kirchner, Carolina Nunes; Cho, Hyeongrae; Kim, Hyoung-Juhn; Henkensmeier, Dirk; Lee, Kwan-Young; Brela, Mateusz; Michalak, Artur; Dyck, Alexander
- Issue Date
- 5월-2015
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- anion exchange membranes; computer modeling; ion exchange; mechanical properties; thermal properties
- Citation
- MACROMOLECULAR MATERIALS AND ENGINEERING, v.300, no.5, pp.497 - 509
- Indexed
- SCIE
SCOPUS
- Journal Title
- MACROMOLECULAR MATERIALS AND ENGINEERING
- Volume
- 300
- Number
- 5
- Start Page
- 497
- End Page
- 509
- ISSN
- 1438-7492
- Abstract
- Methylated polybenzimidazole (O-PBI) based anion exchange membranes with a degree of methylation of ca. 78% were prepared in the iodide, chloride, carbonate, bicarbonate, and hydroxide form. Swelling in water showed a high anisotropy for chloride and carbonate exchangedmembranes and a strong plasticizing effect of water was confirmed by DMA. Carbonate and bicarbonate exchanged membranes revealed an ionomer peak around 0.25 angstrom(-1) in SAXS measurements suggesting a phase separated morphology. Theoretical DFT calculations were used to characterize geometries and electronic structure of polymer models and interactions with different anions, and to rationalize the water uptake/swelling behavior.
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