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Related Concept Videos

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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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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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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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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Synthesis and Characterization of Supramolecular Colloids
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Design colloidal particle morphology and self-assembly for coating applications.

Shan Jiang1, Antony Van Dyk, Alvin Maurice

  • 1Department of Materials Science and Engineering, Iowa State University of Science and Technology, 2220 Hoover Hall, Ames, IA 50011, USA. sjiang1@iastate.edu.

Chemical Society Reviews
|May 5, 2017
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Summary

Waterborne latex coatings are replacing solvent-based ones for environmental benefits. New technologies like diverse particle morphologies and colloidal self-assembly enhance architectural coating performance and sustainability.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Environmental Science

Background:

  • The coating industry is shifting from organic solvent-based to waterborne latex polymer coatings, driven by environmental and health benefits.
  • Current demands include higher performance, lower costs, stricter regulations, and improved sustainability standards for coatings.
  • Waterborne coatings present unique challenges and opportunities for research and development in material science.

Purpose of the Study:

  • To review recent advancements in fundamental studies and industrial applications of new-generation architectural coating materials.
  • To introduce basic concepts in coating materials relevant to modern architectural applications.
  • To showcase key technologies for improving coating performance and design considerations.

Main Methods:

  • Review of current literature on waterborne latex polymer coatings.
  • Analysis of polymer latex binders with diverse particle morphologies.
  • Exploration of colloidal self-assembly techniques in coating formulation.
  • Discussion of key technologies impacting architectural coating design.

Main Results:

  • Development of polymer latex binders with varied particle morphologies to enhance coating performance.
  • Utilization of colloidal self-assembly for cost-effective paint manufacturing.
  • Identification of key technologies crucial for improving architectural coating performance.
  • Progress in both fundamental understanding and industrial application of advanced coating materials.

Conclusions:

  • Waterborne coatings offer significant environmental and health advantages over traditional solvent-based systems.
  • Advanced material design, including particle morphology and self-assembly, is key to meeting performance, cost, and sustainability goals.
  • The reviewed technologies represent critical considerations for the future design of architectural coatings.