Formulating Polyethylene Glycol as Supramolecular Emulsifiers for One-Step Double Emulsions

Area of Science:

• Colloid and Surface Science
• Materials Science
• Polymer Chemistry

Background:

• One-step double emulsions offer simplified preparation and reduced surfactant use.
• Developing novel, efficient emulsifiers is key for practical applications.
• Polyethylene glycol (PEG) is typically hydrophilic and requires hydrophobic anchoring for amphiphilicity.

Purpose of the Study:

• To investigate polyethylene glycol (PEG) as a sole emulsifier for one-step double emulsions.
• To explore the amphiphilic behavior of PEG in a water-chloroform system.
• To demonstrate control over emulsion type through supramolecular interactions.

Main Methods:

• One-step emulsification technique.
• Dissipative particle dynamics simulations.
• Supramolecular complexation with iodine.

Main Results:

• PEG exhibited inherent amphiphilicity, forming single or W/O/W emulsions based on oil/water ratio and PEG concentration.
• Dissipative particle dynamics simulations supported PEG's amphiphilic nature and emulsification capability.
• Complexation of PEG with iodine induced a shift from W/O/W to O/W/O double emulsions.

Conclusions:

• PEG can function as an effective, single-component emulsifier for creating one-step double emulsions.
• Supramolecular chemistry offers a route to tune PEG's amphiphilicity and control emulsion formation.
• This research provides a novel strategy for preparing controllable emulsions.