Pickering-emulsion-templated encapsulation of a hydrophilic amine and its enhanced stability using poly(allyl amine)

Jun Li, Andrew D. Hughes, Tom H. Kalantar, Ian J. Drake, Chris J. Tucker, Jeffrey S. Moore

Research output: Contribution to journalArticle

Abstract

Efficient encapsulation of tetraethylenepentamine (TEPA), as an example aliphatic amine, was achieved by an emulsion-templated, in situ polymerization. Hydrophobically modified clay nanoplatelets were employed as emulsifiers to obtain water-in-oil (W/O) dispersions followed by interfacial polymerization between a portion of the TEPA cargo and polymethylene polyphenylene isocyanate (PMPPI). The resultant capsules exhibit spherical shape, desirable thermal stability, modest barrier properties, and shear-induced release in an epoxide monomer mixture. Most importantly, a significant gain in capsule barrier properties was realized by introducing poly(allyl amine) (pAAm) as an interface-selective reactive additive in the Pickering emulsions. In addition to the fundamental interest of pAAm localization and interface-selective reactivity, this microencapsulation system for aliphatic amines has technological potential in coating, self-healing, and drug-delivery applications. (Figure Presented).

Original languageEnglish (US)
Pages (from-to)976-980
Number of pages5
JournalACS Macro Letters
Volume3
Issue number10
DOIs
StatePublished - Oct 21 2014

ASJC Scopus subject areas

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

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