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Updated: May 12, 2025

Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
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Nanoparticles do not influence droplet break-up, spreading, or splashing.

Mete Abbot1, Muhammad Hamza Iqbal2, Lingyue Liu3

  • 1Institute for Fluid Mechanics and Aerodynamics, Technical University of Darmstadt, Alarich-Weiss-Straße 10, Darmstadt, 64287, Germany.

Journal of Colloid and Interface Science
|April 25, 2025
PubMed
Summary

Nanoparticles in additive-free silica nanosuspensions showed no significant effect on droplet dynamics during breakup and impact. Additives and interparticle forces, not nanoparticles themselves, are key to droplet behavior in applications like inkjet printing.

Keywords:
BreakupDrop impactDropletNanoparticlesSplashingSpreading

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Area of Science:

  • Fluid dynamics
  • Materials science
  • Colloid science

Background:

  • Conflicting literature reports exist on nanoparticle-laden droplet dynamics.
  • Understanding droplet behavior is crucial for applications like inkjet printing and spray coating.

Purpose of the Study:

  • To systematically investigate the influence of nanoparticles on droplet dynamics.
  • To resolve controversies regarding nanoparticle-laden droplet behavior.
  • To elucidate the role of additives and interparticle interactions.

Main Methods:

  • Synthesis of additive-free silica nanosuspensions using the Stöber process.
  • Systematic investigation of droplet breakup, impact, spreading, and splashing.
  • Characterization of nanoparticle loading concentration (up to 15 wt.%).

Main Results:

  • Nanoparticles had a negligible effect on fluid viscosity and droplet dynamics.
  • Droplet behavior remained largely unchanged even at high nanoparticle concentrations.
  • Additives, dispersants, and interparticle interactions were identified as critical factors.

Conclusions:

  • Nanoparticles alone do not significantly alter droplet dynamics in additive-free systems.
  • The presence and nature of additives and interparticle forces are paramount.
  • Findings provide essential insights for optimizing inkjet printing and spray coating processes.