Wrapping with a splash: High-speed encapsulation with ultrathin sheets

Deepak Kumar, Joseph D. Paulsen, Thomas P. Russell, Narayanan Menon

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


Many complex fluids rely on surfactants to contain, protect, or isolate liquid drops in an immiscible continuous phase. Thin elastic sheets can wrap liquid drops in a spontaneous process driven by capillary forces. For encapsulation by sheets to be practically viable, a rapid, continuous, and scalable process is essential. We exploit the fast dynamics of droplet impact to achieve wrapping of oil droplets by ultrathin polymer films in a water phase. Despite the violence of splashing events, the process robustly yields wrappings that are optimally shaped to maximize the enclosed fluid volume and have near-perfect seams. We achieve wrappings of targeted three-dimensional (3D) shapes by tailoring the 2D boundary of the films and show the generality of the technique by producing both oil-in-water and water-in-oil wrappings.

Original languageEnglish (US)
Pages (from-to)775-778
Number of pages4
Issue number6377
StatePublished - Feb 16 2018

ASJC Scopus subject areas

  • General


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