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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 basic...

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Updated: May 10, 2026

Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release

Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release

Published on: February 13, 2016

Monodisperse polymeric ionic liquid microgel beads with multiple chemically switchable functionalities.

Md Taifur Rahman¹, Zahra Barikbin, Abu Zayed M Badruddoza

¹School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, United Kingdom.

Langmuir : the ACS Journal of Surfaces and Colloids

|June 29, 2013

Summary

This summary is machine-generated.

Researchers developed simple, low-cost microfluidic methods to create versatile poly(ionic liquid) microgel beads. These beads offer tunable functionalities for applications in chemical analysis, separations, and sensing.

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Published on: February 27, 2016

Area of Science:

Materials Science
Polymer Chemistry
Microfluidics

Background:

Poly(ionic liquid)s are advanced materials with tunable properties.
Microfluidic fabrication offers precise control over particle synthesis.
Stimuli-responsive materials are crucial for advanced applications.

Purpose of the Study:

To develop a simple and inexpensive microfluidic fabrication method for poly(ionic liquid) microgel beads.
To demonstrate the chemical switchability and enhanced functionalities of these microgel beads.
To showcase precise quantitative measurements of volume transitions and diverse applications.

Main Methods:

Microfluidics-based fabrication of highly monodisperse poly(ionic liquid) microgel beads.
Anion exchange to chemically switch functionalities and molecular inclusion for enhancement.
Quantitative measurements of anion- and solvent-induced volume transitions.

Main Results:

Achieved exquisite control over bead size and shape for precise measurements.
Demonstrated stimuli responsiveness (redox, pH) and functionalities like magnetization and toxic metal removal.
Showcased controlled release of chemical payloads and robust, reversible pH sensing.

Conclusions:

Chemically switchable, stimulus-responsive poly(ionic liquid) microgel beads can be fabricated using simple microfluidics.
These versatile beads enable precise measurements and offer diverse functionalities for various applications.
Potential applications include portable chemical analysis, separations, and spatially addressed sensing.