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Assembly and Characterization of Polyelectrolyte Complex Micelles

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

Macroporous polymer from core-shell particle-stabilized Pickering emulsions.

Zifu Li¹, To Ngai

¹Department of Chemistry, The Chinese University of Hong Kong, Shatin. NT, Hong Kong.

Langmuir : the ACS Journal of Surfaces and Colloids

|March 31, 2010

Summary

This summary is machine-generated.

Poly(styrene-co-N-isopropylacrylamide) (PS-co-PNIPAM) core-shell particles stabilize highly concentrated Pickering emulsions. These particles also form porous membranes upon drying, enabling new functional material applications.

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Published on: October 10, 2016

Area of Science:

Polymer Science
Materials Science
Colloid and Surface Chemistry

Background:

Pickering emulsions offer advantages over conventional emulsions.
Particulate emulsifiers are crucial for emulsion stability.
Core-shell particles provide unique interfacial properties.

Purpose of the Study:

To synthesize PS-co-PNIPAM core-shell particles.
To utilize these particles as emulsifiers for highly concentrated emulsions.
To investigate the formation of porous materials from these emulsions.

Main Methods:

Synthesis of poly(styrene-co-N-isopropylacrylamide) core-shell particles.
Preparation of oil-in-water Pickering emulsions.
Characterization of emulsion stability and structure.
Formation of porous membranes via solvent evaporation.

Main Results:

PS-co-PNIPAM particles effectively stabilized oil-in-water emulsions up to 80 vol % internal phase.
Particles adsorbed at the interface prevented droplet coalescence.
Excess particles formed a gel matrix, inhibiting creaming and phase inversion.
Drying the emulsions yielded porous membranes with particle-packed pore walls.

Conclusions:

PS-co-PNIPAM core-shell particles are effective emulsifiers for concentrated Pickering emulsions.
The developed emulsions can be directly converted into functional porous materials.
This approach offers a versatile route for creating advanced porous structures.