Anisotropic Compartmentalization of the Liquid-Liquid Interface using Dynamic Imine Chemistry
Chinmayee Agashe1, Rohit Varshney1, Rekha Sangwan1
1Institute of Nano Science and Technology, Knowledge City, Manauli, SAS Nagar, Mohali 140306, Punjab, India.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 28, 2022
Summary
Dynamic imine chemistry at oil-water interfaces creates stable, anisotropic compartments. These compartments, controlled by pH, enable stimuli-responsive cargo release, demonstrating novel interfacial engineering.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Chemical Engineering
Background:
- Liquid-liquid interfaces are crucial for compartmentalization in various systems.
- Controlling droplet shape and stability at interfaces is key for advanced materials.
- Dynamic covalent chemistry offers tunable properties for interfacial applications.
Purpose of the Study:
- To investigate the use of dynamic imine chemistry at oil-water interfaces.
- To explore the modulation of droplet shape and interfacial stability using dynamic covalent bonds.
- To demonstrate stimuli-responsive behavior for potential applications like cargo release.
Main Methods:
- Formation of imine bonds between aromatic aldehydes and polyethyleneimine at the oil-water interface.
- Application of compressive force to induce jamming of imine-mediated assemblies.
- Alteration of compartmentalization by changing the pH of the aqueous phase.
- Proof-of-concept demonstration of pH-triggered cargo release.
Main Results:
- Imine bond formation significantly stabilized the oil-water interface by reducing interfacial tension.
- Compressive force led to the jamming of imine assemblies, creating anisotropic compartmentalization.
- The compartmentalization structure was successfully altered by adjusting environmental pH.
- A pH-triggered cargo release across the interfacial membrane was achieved.
Conclusions:
- Dynamic imine chemistry provides a robust method for stabilizing and structuring liquid-liquid interfaces.
- The created anisotropic compartments are tunable via pH, enabling stimuli-responsive control.
- This approach demonstrates the potential for developing advanced interfacial materials with controlled cargo delivery capabilities.
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