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Related Experiment Video

Updated: Jun 9, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Designing Pyridinium-Catalyzed Interfacial Polymerization for High-Performance Acid-Resistant Nanofiltration

Huawen Peng1, Jiapeng Li1, Qianqian Zhang1

  • 1Key Laboratory of Material Chemistry For Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, P. R. China.

Angewandte Chemie (International Ed. in English)
|June 7, 2026
PubMed
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A new pyridinium-catalyzed interfacial polymerization strategy rapidly synthesizes acid-resistant polyamide membranes. This breakthrough enhances cyanuric chloride reactivity for high-performance membranes crucial for efficient lithium and cobalt recovery.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Chemical Engineering

Background:

  • Polyamide membranes synthesized via "acyl ~ amine" interfacial polymerization are widely used but lack acid stability.
  • Cyanuric chloride (CC) forms acid-stable bonds but its third chloride is unreactive at room temperature, limiting membrane synthesis.

Purpose of the Study:

  • To develop a novel pyridinium-catalyzed interfacial polymerization (PCIP) strategy to enhance CC reactivity.
  • To synthesize high-performance, acid-resistant membranes using this new method.

Main Methods:

  • Designed a monomer with triple pyridines that form pyridiniums during polymerization.
  • Utilized the electron-withdrawing capacity of pyridiniums to activate CC for rapid interfacial polymerization.
  • Synthesized large-area membranes in approximately 1 minute.
Keywords:
acid‐resistant membranesinterfacial polymerizationlithium recoverynanofiltrationpyridinium catalyzation

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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
07:32

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Related Experiment Videos

Last Updated: Jun 9, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
07:32

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Main Results:

  • Achieved rapid (1 min) synthesis of large-area (∼0.5 m²) acid-resistant membranes.
  • The synthesized membrane demonstrated stability in 2 M H₂SO₄.
  • Exhibited high separation performance (permeance: ∼16.8 L m⁻² h⁻¹ bar⁻¹, selectivity: ∼12.8).
  • Showcased approximately 4 times higher efficiency in recovering lithium and cobalt from spent LiCoO₂ batteries.

Conclusions:

  • The PCIP strategy significantly enhances CC reactivity, enabling rapid synthesis of robust, high-performance membranes.
  • These novel membranes offer excellent acid resistance and superior efficiency for critical metal recovery from spent batteries.