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Micelles

Micelles

Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...

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Related Experiment Video

Updated: May 29, 2026

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

Temperature-triggered micellization of block copolymers on an ionic liquid surface.

Haiyun Lu¹, Bulent Akgun, Xinyu Wei

¹Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.

Langmuir : the ACS Journal of Surfaces and Colloids

|September 3, 2011

Summary

Thermally induced micellization of polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) block copolymer thin films was studied on ionic liquids. Highly ordered spherical micelles formed, with behavior dependent on film thickness.

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Last Updated: May 29, 2026

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

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Published on: June 20, 2019

Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Block copolymers self-assemble into nanostructures.
Ionic liquids offer tunable solvent properties.
Controlling nanostructure morphology is crucial for applications.

Purpose of the Study:

To investigate thermally induced structural changes in PS-b-P2VP block copolymer thin films.
To explore the role of ionic liquids as a medium for micellization.
To understand the influence of film thickness on nanostructure formation.

Main Methods:

In situ neutron reflectivity to monitor structural changes.
Transmission electron microscopy (TEM) for morphology.
Scanning force microscopy (SFM) for surface topography.

Main Results:

PS-b-P2VP films on ionic liquid formed ordered spherical micelles (PS core, P2VP corona) upon heating.
Micellization was induced by temperature changes, leveraging the ionic liquid's tunable solvent properties.
Bilayer films exhibited temperature-dependent micellization influenced by layer thicknesses.

Conclusions:

Ionic liquids can induce and control the self-assembly of block copolymer thin films into ordered nanostructures.
Temperature is a key parameter for tuning micellization and nanostructure morphology.
Film architecture, including bilayer configurations, significantly impacts the self-assembly process.