Controlling the morphology of polyurea microcapsules using microfluidics

Ingmar Polenz, Sujit S. Datta, David A. Weitz

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


We use microfluidics to continuously produce monodisperse polyurea microcapsules (PUMCs) having either aqueous or nonaqueous cores. The microcapsule shells are formed by the reaction between an isocyanate, dissolved in oil, and an amine, dissolved in water, at the surface of oil-in-water or water-in-oil drops immediately as they are formed. Different microcapsule morphologies can be generated using our approach. The thickness of the microcapsule shell increases with an increase in the amine solubility in the oil; this finding provides a simple mechanism by which the PUMC shell thickness can be controlled.

Original languageEnglish (US)
Pages (from-to)13405-13410
Number of pages6
Issue number44
StatePublished - Nov 11 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Spectroscopy
  • General Materials Science
  • Surfaces and Interfaces
  • Electrochemistry


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