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Double network anion exchange membrane with excellent flexibility and stability.
- Source :
-
Journal of Membrane Science . Oct2019, Vol. 587, p117178-117178. 1p. - Publication Year :
- 2019
-
Abstract
- A double-network anion exchange membrane (TA/AT-PEK/PVA-x) was prepared by Br-PEK and PVA, 3-amino-1,2,4 triazole forms a cross-linking structure with PVA under the action of 1,4-phthalaldehyde and then triazole can be linked with Br-PEK. The structure of membranes was verified by FT-IR. The composite membrane is uniform and smooth can be seen from the scanning electron microscope (SEM) and exhibit good hydrophilic/hydrophobic micro-phase separation structure proved by Transmission electron micrograph (TEM). The ionic conductivity of TA/AT-PEK/PVA-0.15 is 0.062 S/cm at 80 °C. With the addition of PVA within a certain range, the water uptake, swelling ratio hydroxide conductivity and alkaline stability are increase. The membranes are more flexible. After immersing in 4 M NaOH solutions for 240 h at 80 °C, it remains at least 65% of its initial hydroxide ion conductivity of TA/AT-PEK/PVA-0.3 membrane. With the increasing number of water molecules solvating the hydroxide, its nucleophilicity and basicity were hindered, which enhance alkaline stability of anion exchange membranes. • A series of double-network anion exchange membranes are synthesized. • Exhibit good hydrophilic/hydrophobic micro-phase separation structure. • The anion exchange membranes are flexible and stable under high alkaline solutions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03767388
- Volume :
- 587
- Database :
- Academic Search Index
- Journal :
- Journal of Membrane Science
- Publication Type :
- Academic Journal
- Accession number :
- 137292040
- Full Text :
- https://doi.org/10.1016/j.memsci.2019.117178