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Porous Membranes Built Up from Hydrophilic Poly(ionic liquid)s
Karoline Täuber1, Annett Zimathies2, Jiayin Yuan1
1Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.
Macromolecular Rapid Communications
|October 16, 2015
Summary
Researchers created novel porous polymer membranes using poly(ionic liquid)s for the first time. These membranes exhibit stimuli-responsive porosity, changing pore structure in different solvents, enabling selective filtration applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Poly(ionic liquid)s (PILs) are versatile polymers with tunable properties.
- Fabrication of porous membranes often requires complex procedures.
- Stimuli-responsive materials offer advanced functionalities in separation technologies.
Purpose of the Study:
- To develop a novel method for fabricating porous polymer membranes using poly(ionic liquid)s.
- To investigate the stimuli-responsive behavior of these membranes.
- To demonstrate their potential in selective filtration.
Main Methods:
- Fabrication of porous membranes via electrostatic complexation of a water-soluble poly(ionic liquid).
- Simultaneous phase separation of the PIL and ionic complexation with an acid in a basic nonsolvent solution.
- Characterization of membrane porosity and stimuli-responsive behavior.
Main Results:
- Successfully fabricated porous polymer membranes from a water-soluble PIL for the first time.
- Demonstrated stimuli-responsive porosity, with pores opening in isopropanol and closing in water.
- Filtration experiments showed significantly slower water permeation compared to isopropanol.
Conclusions:
- Electrostatic complexation offers a facile route to stimuli-responsive porous PIL membranes.
- The developed membranes exhibit tunable porosity, opening avenues for smart separation systems.
- This work presents a new class of functional porous materials with potential applications in microfluidics and separation.
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