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초록
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.
키워드
anion exchange membranes; computer modeling; ion exchange; mechanical properties; thermal properties; FUEL-CELL APPLICATIONS; POLYMERIZED IONIC LIQUIDS; FOCK-SLATER CALCULATIONS; TRANSITION-STATE METHOD; AQUEOUS-SOLUTION; HYDRATION STRUCTURE; IMPLICIT SOLVATION; CONDUCTING POLYMER; FREE-ENERGIES; STABILITY
- 제목
- Phase Separated Methylated Polybenzimidazole (O-PBI) Based Anion Exchange Membranes
- 저자
- Germer, Wiebke; Leppin, Janine; Kirchner, Carolina Nunes; Cho, Hyeongrae; Kim, Hyoung-Juhn; Henkensmeier, Dirk; Lee, Kwan-Young; Brela, Mateusz; Michalak, Artur; Dyck, Alexander
- 발행일
- 2015-05
- 유형
- Article
- 권
- 300
- 호
- 5
- 페이지
- 497 ~ 509