Microencapsulation of a reactive liquid-phase amine for self-healing Epoxy composites

David A. McIlroy, Benjamin J. Blaiszik, Mary M. Caruso, Scott R. White, Jeffrey S. Moore, Nancy R. Sottos

Research output: Contribution to journalArticlepeer-review

Abstract

A method was developed for the preparation of microcapsules containing a reactive amine with potential applications in self-healing polymers. Amine core microcapsules were prepared by interfacial polymerization of an isocyanate and an amine stabilized by an inverse Pickering emulsion. Microcapsules were successfully isolated, dried, and redispersed in epoxy. Visualization of capsules in cured epoxy was carried out by the addition of fluorescent dye to the core material. Mass spectrometry of capsule core material indicated the presence of the desired starting material. Fill content was estimated at 55 wt % by thermogravimetric analysis, and titration of the capsule core material gave an amine equivalent weight of 254 g/mol NH2. Capsules released the core material upon rupture and were able to cure epoxy to form a polymer film.

Original languageEnglish (US)
Pages (from-to)1855-1859
Number of pages5
JournalMacromolecules
Volume43
Issue number4
DOIs
StatePublished - Feb 23 2010

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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