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Colloidal precipitates

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...

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Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules

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Golf Ball-like Polymer Particles by Colloidal Etching.

Yifeng Jiang¹, Lu Zhao¹, Ruisi Li¹

¹School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.

Langmuir : the ACS Journal of Surfaces and Colloids

|November 27, 2024

Summary

This summary is machine-generated.

Researchers created golf ball-like polymer particles using a novel colloidal etching method. This rapid fabrication technique transforms raspberry-like composite particles into well-defined spherical structures with potential applications in materials science.

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Area of Science:

Polymer Science
Materials Chemistry
Colloid Science

Background:

Raspberry-like core-corona particles offer unique templating potential.
Synthesis of well-defined raspberry-like polymer-polymer composite particles is challenging.
Selective corona particle removal can yield novel morphologies.

Purpose of the Study:

To develop a facile method for fabricating golf ball-like polymer particles.
To investigate the colloidal etching of raspberry-like poly(glycidyl methacrylate)-polystyrene (PGMA-PS) composite particles.
To explore the influence of synthesis parameters on particle morphology.

Main Methods:

Colloidal etching of PGMA-PS raspberry-like particles.
Utilizing a tetrahydrofuran (THF)/water medium with varying THF concentrations.
Investigating the effects of etching time and composite particle size.

Main Results:

Successfully fabricated well-defined golf ball-like polymer particles.
Achieved rapid formation of golf ball morphology within 20 seconds.
Demonstrated that a high THF concentration is crucial for rapid transformation.

Conclusions:

The developed colloidal etching method provides an efficient route to golf ball-like polymer particles.
High THF concentration in the etching medium is a key parameter for rapid morphology formation.
This work expands the utility of raspberry-like particles as templates in materials synthesis.