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Related Concept Videos

Colloids03:22

Colloids

20.7K
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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Updated: Jan 16, 2026

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Tailored multifunctional polysiloxanes as advanced emulsifiers in colloid systems.

Anna Olejnik1,2, Bogna Sztorch3, Miłosz Frydrych3

  • 1Center for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614, Poznań, Poland. anna.olejnik@amu.edu.pl.

Scientific Reports
|September 29, 2025
PubMed
Summary

This study optimized polysiloxane emulsifiers using trimethoxysilane, eugenol, and octane. A 1:4:3 ratio yielded superior thermal and emulsion stability, crucial for cosmetics and pharmaceuticals.

Keywords:
Colloidal stabilityEmulsifiersHydrosilylationInterfacial engineeringMultifunctional polysiloxanesPolysiloxanes

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry

Background:

  • Polysiloxanes are versatile polymers with tunable properties.
  • Developing effective emulsifiers is critical for various industries, including cosmetics and pharmaceuticals.
  • Organosilicon compounds offer unique interfacial properties.

Purpose of the Study:

  • To synthesize and characterize multifunctional polysiloxanes modified with trimethoxysilane, eugenol, and octane.
  • To evaluate the emulsifying performance and stability of these modified polysiloxanes in oil-water emulsions.
  • To determine the optimal molar ratio for enhanced thermal and emulsion stability.

Main Methods:

  • Synthesis via hydrosilylation.
  • Characterization using NMR, FT-IR, thermogravimetric analysis, and contact angle measurements.
  • Emulsion stability assessment via centrifugation, multiple light scattering, and optical microscopy.

Main Results:

  • The polysiloxane modified with trimethoxysilane: eugenol: octane in a 1:4:3 molar ratio showed the highest thermal stability.
  • Emulsions formulated with the 1:4:3 modified polysiloxane exhibited superior physical stability (backscattering destabilization rate: -0.29%/day).
  • Polysiloxanes modified only with eugenol and octane showed significantly lower stability (phase separation within 1.5 h, -1.06%/day).

Conclusions:

  • Silane functionalities play a critical role in achieving enhanced interfacial stabilization.
  • Structurally tailored polysiloxanes demonstrate significant potential as advanced emulsifiers.
  • Optimized polysiloxanes can be applied in cosmetics, pharmaceuticals, and other industries requiring stable emulsions.