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Ion Exchange

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...

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Updated: Jun 2, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Interfacial Constructing Poly(ionic liquids) on Nanoporous Block Copolymers for Antifouling Ultrafiltration.

Xiangyue Ye¹, Ruotong Zhang¹, Jiemei Zhou¹

¹State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, People's Republic of China.

Langmuir : the ACS Journal of Surfaces and Colloids

|January 15, 2025

Summary

This study introduces a one-step method to create poly(ionic liquid) membranes with enhanced water permeability and antifouling properties. These functionalized membranes show great potential for advanced water treatment applications.

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

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Last Updated: Jun 2, 2025

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Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

Area of Science:

Materials Science
Polymer Chemistry
Membrane Technology

Background:

Poly(ionic liquids) (PILs) offer tunable structures for advanced membrane applications.
Integrating PILs into membranes enhances properties for separation technologies.

Purpose of the Study:

Develop a facile one-step method for preparing PIL-functionalized membranes.
Investigate the properties and potential applications of these novel membranes.

Main Methods:

A one-step process combining swelling-induced pore generation and ionic liquid functionalization.
Utilized block copolymer films (PDMAEMA-b-PS) immersed in ethanol and bromopropane.
Interfacial quaternization reaction to form PIL-Br functionalized membranes (SIL-Br).

Main Results:

Achieved nanoporous structures and PIL-Br functionalization in a single step.
Resulting SIL-Br membranes exhibited significantly higher water permeability due to increased pore size and hydrophilicity.
Anion exchange formed SIL-Pro membranes with electrical neutrality and excellent protein resistance.

Conclusions:

The developed method offers a facile route to PIL-functionalized membranes.
These membranes demonstrate superior water permeability and antifouling properties.
Potential applications in water treatment and antifouling membrane technology.