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Related Concept Videos

Colloids03:22

Colloids

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...
The Colloidal State01:29

The Colloidal State

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 the...
Colloids and Suspensions01:17

Colloids and Suspensions

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 visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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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Updated: May 31, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Amphiphilic patchy composite colloids.

Shujiang Ding1, Chengliang Zhang, Wei Wei

  • 1State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Macromolecular Rapid Communications
|June 28, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed new patchy silica/polymeric gel composite colloids with amphiphilic properties. These particles act as solid surfactants, dispersing in both water and oil, and aiding other materials

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Area of Science:

  • Materials Science
  • Colloid Science
  • Surface Chemistry

Background:

  • Composite colloids are crucial in various applications.
  • Achieving amphiphilic properties in composite materials presents challenges.
  • Controlling surface modification is key for tailored material performance.

Purpose of the Study:

  • To develop a novel method for fabricating patchy silica/polymeric gel composite colloids.
  • To impart amphiphilic performance to these composite colloids.
  • To explore their utility as solid particle surfactants and dispersants.

Main Methods:

  • Fabrication of silica/polymeric gel composite colloids.
  • Selective surface modification of the silica framework using silanes with oleophilic alkyl chains.
  • Sequential activation of carbon and modification of silica for silica/carbon composites.

Main Results:

  • Successfully synthesized patchy composite colloids exhibiting amphiphilic behavior.
  • Demonstrated dispersibility of the colloids in both aqueous and oil phases.
  • Showcased their effectiveness as solid particle surfactants.
  • Validated the ability of the modified silica framework to aid dispersion of other functional materials.
  • Developed amphiphilic silica/carbon composite colloids with retained electron conductivity.

Conclusions:

  • The reported approach enables the fabrication of versatile amphiphilic composite colloids.
  • These materials serve as effective solid particle surfactants and dispersants.
  • The method offers a pathway to engineer composite materials with tunable interfacial properties.