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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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Responsive core-shell latex particles as colloidosome microcapsule membranes.

Qingchun Yuan1, Olivier J Cayre, Syuji Fujii

  • 1Institute of Particle Science and Engineering, School of Processing, Environment and Materials Engineering, University of Leeds, Leeds LS2 9JT, UK. q.yuan@leeds.ac.uk

Langmuir : the ACS Journal of Surfaces and Colloids
|October 30, 2010
PubMed
Summary
This summary is machine-generated.

Responsive core-shell latex particles form stable colloidosome microcapsules via thermal annealing or cross-linking. This method enables high-concentration production of stimulus-responsive microcapsules with tunable properties.

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry
  • Polymer Science

Background:

  • Colloidosome microcapsules offer tunable properties for various applications.
  • Previous methods for colloidosome production often face limitations in concentration and scalability.
  • Responsive core-shell latex particles provide unique characteristics for microcapsule fabrication.

Purpose of the Study:

  • To develop a scalable method for producing stimulus-responsive colloidosome microcapsules.
  • To investigate the use of responsive core-shell latex particles for microcapsule formation.
  • To explore both thermal annealing and chemical cross-linking for shell immobilization.

Main Methods:

  • Preparation of core-shell latex particles with a polystyrene core and a responsive PDMA-b-PMMA shell.
  • Formation of Pickering emulsion droplets stabilized by the core-shell particles.
  • Immobilization of particle monolayers via thermal annealing (75-86 °C) or internal chemical cross-linking.

Main Results:

  • Stable colloidosome microcapsules were successfully fabricated using both thermal annealing and cross-linking methods.
  • The responsive shell facilitated particle immobilization at high emulsion concentrations.
  • Microcapsules exhibited stimulus-responsive behavior and tunable porosity/mechanical strength based on membrane structure.

Conclusions:

  • Responsive core-shell latex particles are effective building blocks for scalable colloidosome production.
  • Both thermal annealing and chemical cross-linking offer viable routes for creating robust, stimulus-responsive microcapsules.
  • The developed methods allow for high-concentration production of microcapsules with controlled properties.