Core-Shell Polymeric Microcapsules with Superior Thermal and Solvent Stability

Sen Kang, Marta Baginska, Scott R. White, Nancy R. Sottos

Research output: Contribution to journalArticlepeer-review

Abstract

A protective polydopamine (PDA) coating is applied to core-shell microcapsule surfaces by the polymerization of dopamine monomers. A neutral aqueous solution and the addition of an oxidant (i.e., ammonium persulfate) are crucial for microcapsule survival and the initiation of PDA polymerization, respectively. The resulting PDA coating is a dense and uniform layer approximately 50 nm thick. The PDA protective coating significantly increases capsule stability at an elevated temperature (180°C) and in a variety of organic solvents and acidic/basic solutions that otherwise lead to deflation and loss of the core content of uncoated microcapsules. (Graph Presented).

Original languageEnglish (US)
Pages (from-to)10952-10956
Number of pages5
JournalACS Applied Materials and Interfaces
Volume7
Issue number20
DOIs
StatePublished - May 27 2015

Keywords

  • Microcapsules
  • Polydopamine
  • Solvent stability
  • Thermal stability

ASJC Scopus subject areas

  • Materials Science(all)

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