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Highly Interfacial Active Gemini Surfactants as Simple and Versatile Emulsifiers for Stabilizing, Lubricating and
Fuli Yan1, Lulin Hu1,2, Zhongying Ji1,2
1Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai, 264006, China.
Angewandte Chemie (International Ed. in English)
|February 21, 2024
Summary
A novel zwitterionic Gemini surfactant stabilizes and structures liquids, offering an alternative to nanoparticles. This surfactant also provides excellent lubrication, creating advanced liquid-based materials.
Area of Science:
- Materials Science
- Surface Chemistry
- Fluid Dynamics
Background:
- Stabilizing liquids in non-equilibrium states typically involves jamming nanoparticle surfactants at interfaces.
- Existing methods often rely on specific nanoparticle properties for liquid structuring and stabilization.
Purpose of the Study:
- To investigate a synthetic water-soluble zwitterionic Gemini surfactant as an alternative to nanoparticle surfactants.
- To explore its capabilities in stabilizing, structuring, and lubricating liquids.
- To assess its potential for creating advanced liquid devices and lubricants.
Main Methods:
- Characterizing the binding energy of the Gemini surfactant at the paraffin oil/water interface.
- Utilizing extrusion printing and 3D printing techniques to structure liquids.
- Evaluating the tribochemical reactions and lubricity of the resulting emulsions under load.
Main Results:
- The Gemini surfactant achieved near-zero interfacial tensions and ultrahigh surface coverages, comparable to nanoparticles.
- Closely packed, mechanically elastic monolayers were formed, enabling the creation of ultra-stable emulsions and structured liquids.
- The surfactant imparted favorable lubricity to emulsions via tribochemical reactions, even under high load conditions.
Conclusions:
- Zwitterionic Gemini surfactants offer a versatile alternative to nanoparticles for liquid stabilization and structuring.
- These surfactants can create complex liquid geometries and provide enhanced lubrication properties.
- The findings open new avenues for developing liquid devices and next-generation lubricants.
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