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Ultraselective Permeable Polyamide Membranes Prepared via Interfacial Polymerization of Alkane and Deep Eutectic
Jiansong Liu1, Yang Yang1, Shuai Gu1
1Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
Angewandte Chemie (International Ed. in English)
|May 28, 2025
Summary
A novel alkane/deep eutectic solvent (DES) interfacial polymerization method creates ultraselective polyamide membranes. This approach enhances water purification by precisely controlling nanoconfinement and improving salt separation selectivity.
Area of Science:
- Materials Science
- Chemical Engineering
- Nanotechnology
Background:
- Conventional alkane/water interfacial polymerization struggles with precise nanoconfinement in polyamide membranes.
- Achieving well-defined pore architecture requires strategies to slow diffusion and suppress side reactions.
Purpose of the Study:
- To develop an advanced interfacial polymerization approach for fabricating ultraselective permeable polyamide membranes.
- To utilize deep eutectic solvents (DES) to overcome challenges in membrane nanoconfinement and pore structure control.
Main Methods:
- Introduced an alkane/deep eutectic solvent (DES) interfacial polymerization technique.
- Employed DES as an anhydrous solvent to prevent side reactions and regulate monomer diffusion.
- Utilized the hydrogen bonding network of DES to control oligomer assembly and pore formation.
Main Results:
- Successfully prepared polyamide membranes with uniform subnanometer pores.
- Achieved exceptional NaCl/Na2SO4 separation selectivity (165.8), significantly higher than conventional membranes.
- Demonstrated impressive water permeance of up to 18.4 L m-2 h-1 bar-1.
Conclusions:
- The alkane/DES interfacial polymerization strategy enables precise nanoconfinement and ultraselective polyamide membrane fabrication.
- DES plays a crucial role in regulating monomer diffusion and enhancing membrane performance.
- This method represents a paradigm shift for advanced water purification systems.
