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Related Concept Videos

The Colloidal State01:29

The Colloidal State

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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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Colloids03:22

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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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Colloids and Suspensions01:17

Colloids and Suspensions

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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 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...
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Colloidal precipitates01:09

Colloidal precipitates

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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...
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Coagulation01:06

Coagulation

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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...
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Intralumenal Vesicles and Multivesicular Bodies01:38

Intralumenal Vesicles and Multivesicular Bodies

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Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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Synthesis and Characterization of Supramolecular Colloids
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Colloidosomes: synthesis, properties and applications.

Kate L Thompson1, Mark Williams1, Steven P Armes1

  • 1Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, UK.

Journal of Colloid and Interface Science
|December 24, 2014
PubMed
Summary
This summary is machine-generated.

Colloidosomes, self-assembled microcapsules, offer flexible cargo release. This review details their preparation methods and evaluates their potential for encapsulating various active substances.

Keywords:
ColloidosomesLatexesMicrocapsulesNanoparticlesPickering emulsions

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry

Background:

  • Colloidosomes are self-assembled microcapsules with tunable functionalities.
  • Their shells are composed of colloidal particles, enabling diverse applications.

Purpose of the Study:

  • To review the preparation techniques for colloidosomes.
  • To evaluate the advantages and disadvantages of different methods.
  • To assess the potential of colloidosomes for encapsulating small and large molecules.

Main Methods:

  • Literature review of colloid assembly techniques.
  • Analysis of particle types used in colloidosome fabrication.
  • Evaluation of encapsulation efficiencies for different active substances.

Main Results:

  • Various particles and assembly methods exist for creating colloidosomes.
  • Each method presents unique advantages and limitations.
  • Colloidosomes show promise for microencapsulation of diverse actives.

Conclusions:

  • Colloidosome technology is a versatile platform for microencapsulation.
  • Further research can optimize preparation and application of these structures.