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Related Concept Videos

Micelles01:30

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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Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...
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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...

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Updated: Jun 11, 2026

Enriching Subcellular Proteins in Leptospira Using a Triton X-114-Based Fractionation Approach
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Published on: August 8, 2025

Microphase separation in polymer solutions containing surfactants.

E N Govorun1, A S Ushakova, A R Khokhlov

  • 1Faculty of Physics, Moscow State University, 119991, Leninskie gory, Moscow, Russia. govorun@polly.phys.msu.ru

The European Physical Journal. E, Soft Matter
|July 15, 2010
PubMed
Summary

This study explores microphase separation in polymer-surfactant solutions. Surfactant orientation drives microstructure formation, leading to ordered phases like lamellar and hexagonal structures with changing conditions.

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

Published on: October 10, 2016

Area of Science:

  • Physical Chemistry
  • Materials Science
  • Polymer Science

Background:

  • Microphase separation is crucial in polymer solutions with surfactants.
  • Surfactant amphiphilicity drives self-assembly and ordering.
  • Understanding these phenomena is key for designing advanced materials.

Purpose of the Study:

  • To theoretically investigate microphase separation in polymer-surfactant solutions.
  • To explore the role of surfactant orientation in microstructure formation.
  • To predict phase diagrams and structural transitions.

Main Methods:

  • Theoretical analysis in the weak-segregation regime.
  • Free energy calculations for various morphologies (lamellar, hexagonal, cubic).
  • Modeling surfactant molecules as dimers with distinct hydrophobic and polar parts.

Main Results:

  • Surfactant orientational ordering leads to solution non-homogeneities.
  • Phase diagrams predict transitions from disordered to ordered states (bcc, hexagonal, lamellar).
  • A critical amphiphilicity degree is required for microstructure formation.

Conclusions:

  • Surfactant-polymer interactions and solvent quality dictate phase behavior.
  • Lamellar microstructure period decreases with increasing concentrations.
  • The study provides a theoretical framework for predicting microstructures in complex fluids.