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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...

Ion-Exchange Chromatography

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...

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Updated: Apr 27, 2026

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

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Published on: February 5, 2019

Graphene/Ionic liquid composite films and ion exchange.

Yufei Mo¹, Yunfang Wan², Alicia Chau²

¹1] Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, P. R. China [2] School of Engineering & Applied Science, The George Washington University, Washington DC, 20052, United States.

Scientific Reports

|June 28, 2014

Summary

This summary is machine-generated.

Graphene

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Area of Science:

Materials Science
Surface Chemistry
Nanotechnology

Background:

Controlling graphene's surface properties is crucial for advanced applications.
Ionic liquids offer tunable characteristics for material functionalization.

Purpose of the Study:

To engineer adjustable wettability on graphene surfaces.
To investigate the influence of ionic liquid functionalization on graphene's mechanical properties.

Main Methods:

Synthesizing functionalized ionic liquids (ILs) for surface modification.
Measuring graphene surface wettability with varying anions.
Analyzing mechanical properties (elasticity, adhesion) using nanoindentation.

Main Results:

Anion type significantly impacts graphene/IL composite film properties.
Wettability and mechanical behavior are quantitatively linked to surface counter-anions.
Solvent systems affect ion exchange ratios on graphene.

Conclusions:

Surface anions are key determinants of graphene/IL composite film characteristics.
Surface wetting and mechanics can be precisely controlled via anion selection.
This approach may enable quantitative detection of surface ions using surface force measurements.