Elastic properties of liquid marbles

Edward Bormashenko, Roman Pogreb, Revital Balter, Hadas Aharoni, Yelena Bormashenko, Roman Grynyov, Leonid Mashkevych, Doron Aurbach, Oleg Gendelman

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Liquid marbles are non-stick droplets coated with colloidal particles. Liquid marbles do not coalesce when pressed one to another or when colliding. The paper is devoted to the study of the quasi-elastic properties of liquid marbles under collisions. It was established that the contact time under collision is independent of the velocity of the cue marble. The liquid marble was modeled by a droplet coated by an elastic shell, representing the colloidal layer covering the marble. The elasticity of the shell is due to the capillary interaction between colloidal particles. The physical model of collisions is proposed. Pathways of viscous dissipation are discussed. Scaling laws describing the collision are derived. The proposed scaling laws governing the marbles’ collisions were verified experimentally. The contact time of the collision scales as the square root of the marbles’ volume as it occurs under bouncing of droplets. Pathways of viscous dissipation are discussed.

Original languageEnglish
Pages (from-to)2157-2164
Number of pages8
JournalColloid and Polymer Science
Volume293
Issue number8
DOIs
StatePublished - 24 Aug 2015

Bibliographical note

Publisher Copyright:
© 2015, Springer-Verlag Berlin Heidelberg.

Keywords

  • Coalescence
  • Collisions
  • Colloidal particles
  • Elastic shell
  • Liquid marbles
  • Scaling law

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