Crosslinking of a Single Poly(ionic liquid) by Water into Porous Supramolecular Membranes

Reversible regulation of membrane microstructures via non‐covalent interactions is of considerable interest yet remains a challenge. Herein, we discover a general one‐step approach to fabricate supramolecular porous polyelectrolyte membranes (SPPMs) from a single poly(ionic liquid) (PIL). The experi...

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Published in:Angewandte Chemie International Edition 2020-09, Vol.59 (39), p.17187-17191
Main Authors: Shao, Yue, Wang, Yong‐Lei, Li, Xiangshuai, Kheirabad, Atefeh Khorsand, Zhao, Qiang, Yuan, Jiayin, Wang, Hong
Format: Article
Language:English
Subjects:
Crosslinking
Ionic liquids
Ions
Membranes
Molecular structure
noncovalent interactions
Phase separation
poly(ionic liquid)s
Polyelectrolytes
Porosity
reversible porosity
supramolecular membranes
Thermal stimuli
Water chemistry
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Summary:Reversible regulation of membrane microstructures via non‐covalent interactions is of considerable interest yet remains a challenge. Herein, we discover a general one‐step approach to fabricate supramolecular porous polyelectrolyte membranes (SPPMs) from a single poly(ionic liquid) (PIL). The experimental results and theoretical simulation suggested that SPPMs were formed by a hydrogen‐bond‐induced phase separation of a PIL between its polar and apolar domains, which were linked together by water molecules. This unique feature was capable of modulating microscopic porous architectures and thus the global mechanical property of SPPMs by a rational design of the molecular structure of PILs. Such SPPMs could switch porosity upon thermal stimuli, as exemplified by dynamically adaptive transparency to thermal fluctuation. This finding provides fascinating opportunities for creating multifunctional SPPMs. Supramolecular porous polyelectrolyte membranes are constructed by utilizing water as cross‐linker from a single poly(ionic liquid). Owing to the intrinsic dynamic nature of hydrogen bonding, these SPPMs could switch porosity upon thermal stimuli, which is exemplified by dynamically adaptive transparency to thermal fluctuation.
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202002679