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Rough and Tough: How Particle Surface Roughness Affects Liquid Marble Formation and Stability
Umair Sultan1, Celin Kotulla1, Kall Kefle1
1Institute of Particle Technology, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstrasse 4, 91058, Erlangen, Germany.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|April 7, 2025
Summary
Surface roughness of particles enhances liquid marble stability by increasing deformation resistance and contact angle. This finding improves the formation of stable liquid marbles from various liquids.
Area of Science:
- Materials Science
- Colloid and Surface Chemistry
Background:
- Liquid marbles are versatile liquid droplets stabilized by particles.
- Their properties and stability depend on particle characteristics.
Purpose of the Study:
- To investigate the effect of particle surface roughness on liquid marble properties.
- To understand the relationship between surface roughness and liquid marble stability.
Main Methods:
- Utilized colloidal supraparticles as model systems with tunable surface roughness.
- Varied primary particle size within supraparticles to control surface roughness.
- Analyzed the impact of surface roughness on contact angle and mechanical properties.
Main Results:
- Increased surface roughness led to a higher interfacial contact angle.
- Enhanced surface roughness improved liquid marble deformation resistance, hindering rupture.
- Higher contact angles facilitated the formation of liquid marbles from low-surface-tension liquids.
Conclusions:
- Particle surface roughness is a critical factor in liquid marble stability.
- Tailoring surface roughness offers a method to control liquid marble properties for diverse applications.
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