Nanoscopic interactions of colloidal particles can suppress millimetre drop splashing

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2021
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Thoraval, Marie-Jean
Schubert, Jonas
Chanana, Munish
Boyer, François
Sandoval-Naval, Enrique
Dijksman, J. Frits
Snoeijer, Jacco H.
Lohse, Detlef
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Soft Matter. Royal Society of Chemistry (RSC). 2021, 17(20), pp. 5116-5121. ISSN 1744-683X. eISSN 1744-6848. Available under: doi: 10.1039/d0sm01367f
Zusammenfassung

The splashing of liquid drops onto a solid surface is important for a wide range of applications, including combustion and spray coating. As the drop hits the solid surface, the liquid is ejected into a thin horizontal sheet expanding radially over the substrate. Above a critical impact velocity, the liquid sheet is forced to separate from the solid surface by the ambient air, and breaks up into smaller droplets. Despite many applications involving complex fluids, their effects on splashing remain mostly unexplored. Here we show that the splashing of a nanoparticle dispersion can be suppressed at higher impact velocities by the interactions of the nanoparticles with the solid surface. Although the dispersion drop first shows the classical transition from deposition to splashing when increasing the impact velocity, no splashing is observed above a second higher critical impact velocity. This result goes against the commonly accepted understanding of splashing, that a higher impact velocity should lead to even more pronounced splashing. Our findings open new possibilities to deposit large amount of complex liquids at high speeds.

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ISO 690THORAVAL, Marie-Jean, Jonas SCHUBERT, Stefan KARPITSCHKA, Munish CHANANA, François BOYER, Enrique SANDOVAL-NAVAL, J. Frits DIJKSMAN, Jacco H. SNOEIJER, Detlef LOHSE, 2021. Nanoscopic interactions of colloidal particles can suppress millimetre drop splashing. In: Soft Matter. Royal Society of Chemistry (RSC). 2021, 17(20), pp. 5116-5121. ISSN 1744-683X. eISSN 1744-6848. Available under: doi: 10.1039/d0sm01367f
BibTex
@article{Thoraval2021Nanos-67516,
  year={2021},
  doi={10.1039/d0sm01367f},
  title={Nanoscopic interactions of colloidal particles can suppress millimetre drop splashing},
  number={20},
  volume={17},
  issn={1744-683X},
  journal={Soft Matter},
  pages={5116--5121},
  author={Thoraval, Marie-Jean and Schubert, Jonas and Karpitschka, Stefan and Chanana, Munish and Boyer, François and Sandoval-Naval, Enrique and Dijksman, J. Frits and Snoeijer, Jacco H. and Lohse, Detlef}
}
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