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Nanostructured, Fluid-Bicontinuous Gels for Continuous-Flow Liquid-Liquid Extraction.

Mohd A Khan¹, Alessio J Sprockel¹, Katherine A Macmillan¹

¹Van't Hoff Laboratory for Physical and Colloid Chemistry, Department of Chemistry, Debye Institute of Nanomaterials Science, Utrecht University, Utrecht, 3584 CH, The Netherlands.

Advanced Materials (Deerfield Beach, Fla.)

|March 19, 2022

Summary

New nanoparticle-stabilized fluid-bicontinuous gels offer sub-500 nm channels and electroosmotic flow for enhanced molecular separations. These materials significantly improve surface area and permeability for advanced applications.

Keywords:

bijels catalysis electroosmosis extraction nanoparticles

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Published on: April 16, 2018

Area of Science:

Materials Science
Colloid and Surface Chemistry

Background:

Fluid-bicontinuous gels enable interaction between two fluids via a rigid scaffold.
Existing gels have large channels (>5 µm), limiting surface area and fluid flow.

Purpose of the Study:

To develop a scalable synthesis for nanoparticle-stabilized fluid-bicontinuous gels with reduced channel sizes.
To demonstrate liquid flow through these gels for improved applications.

Main Methods:

A scalable synthesis route for nanoparticle-stabilized fluid-bicontinuous gels.
Demonstration of liquid pumping via electroosmosis through the gel network.

Main Results:

Achieved gel channel sizes below 500 nm.
Obtained specific surface areas of 2 m² cm⁻³.
Successfully demonstrated electroosmotic flow through the gel structure.

Conclusions:

The developed gels overcome limitations of traditional fluid-bicontinuous materials.
The gels' high surface area and flow capability enable applications in molecular separations, microreactors, and membranes.