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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

528
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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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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Updated: Jun 14, 2025

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro
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Edible structuring agent shaped via interfacial precipitation on solid template: Crosslinked starch colloidosome.

Peilong Li1, Jieying Li1, Jacob Levin1

  • 1Department of Food Science, Cornell University, Ithaca, NY 14853, USA.

Carbohydrate Polymers
|September 3, 2024
PubMed
Summary
This summary is machine-generated.

Researchers created robust hollow starch particles using Pickering emulsions. These crosslinked colloidosomes offer enhanced stability and viscosity, functioning as super-thickeners in suspensions.

Keywords:
ColloidosomeCrosslinkGranular suspensionPickering emulsionRheologyStarch

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry
  • Rheology

Background:

  • Hollow starch particles offer unique rheological properties but are limited by shell rupture.
  • Developing stable, functional hollow particles is crucial for advanced material applications.

Purpose of the Study:

  • To engineer robust, water-permeable hollow starch particles with enhanced stability and tunable functionality.
  • To investigate the role of microarchitecture in dictating the material properties of starch-based colloidosomes.

Main Methods:

  • Utilized amaranth starch (1 μm) to construct crosslinked superstructures via Pickering emulsion templating.
  • Employed thermal treatment (75°C) and ethanol precipitation for colloidal fusion, followed by sodium tri-metaphosphate crosslinking.
  • Investigated shell integrity and particle stability using different oils (canola, palm) and pH conditions.

Main Results:

  • Developed crosslinked starch colloidosomes (89 μm) with improved viscosity and stability compared to native particles.
  • Identified palm oil emulsification at 50°C as key to forming a rigid core, preventing shell rupture at high pH.
  • Demonstrated a jamming transition above 10 w/w% for hollow structures, indicating super-thickening capabilities.
  • Showcased particle size scalability (>100 μm) with increased templating volume and preservation of shell integrity via gentle harvesting.

Conclusions:

  • Microarchitecture is critical for controlling the functionality and stability of hollow starch particles.
  • Crosslinked starch colloidosomes present a promising platform for applications requiring high viscosity and stability.
  • The developed method offers a pathway to engineer advanced functional materials from starch-based building blocks.