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Related Concept Videos

Micelles01:30

Micelles

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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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The Colloidal State01:29

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The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
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Related Experiment Video

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Nanoemulsions: formation, properties and applications.

Ankur Gupta1, H Burak Eral2, T Alan Hatton1

  • 1Massachusetts Institute of Technology, Cambridge, MA, USA. pdoyle@mit.edu.

Soft Matter
|March 1, 2016
PubMed
Summary

Nanoemulsions, tiny liquid dispersions, offer unique properties like high surface area and stability. This review covers their preparation, stability factors, and diverse applications in fields like drug delivery and food science.

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Area of Science:

  • Colloid and Surface Science
  • Materials Science

Background:

  • Nanoemulsions are kinetically stable liquid-in-liquid dispersions with nanoscale droplet sizes (~100 nm).
  • Their unique properties include high surface area, robust stability, optical transparency, and tunable rheology.
  • Applications span drug delivery, food, cosmetics, pharmaceuticals, and material synthesis, also serving as models for nanoscale colloidal systems.

Purpose of the Study:

  • To review major methods for preparing nanoemulsions.
  • To discuss theories predicting nanoemulsion droplet size.
  • To summarize factors influencing droplet stability and explore recent applications.

Main Methods:

  • High-energy methods: high-pressure homogenization, ultrasonication.
  • Low-energy methods: phase inversion temperature, emulsion inversion point.
  • Emerging techniques: bubble bursting method.

Main Results:

  • Nanoemulsion properties are dictated by their nanoscale droplet size.
  • Preparation methods significantly influence droplet size and stability.
  • Various physical and chemical factors affect long-term nanoemulsion stability.

Conclusions:

  • Nanoemulsions are versatile systems with broad applicability due to their unique physicochemical properties.
  • Understanding preparation methods and stability factors is crucial for optimizing nanoemulsion performance.
  • Continued research into novel preparation techniques and applications is ongoing.