Composite magnetic microcapsules based on multilayer assembly of ethanol-soluble polyimide brushes and magnetite nanoparticles: preparation and response to magnetic field gradient

M. V. Lomova, I. V. Ivanov, S. V. German, T. K. Meleshko, A. M. Pavlov, O. A. Inozemtseva, M. N. Antipina, A. V. Yakimansky, G. B. Sukhorukov, D. A. Gorin

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Abstract

Microcapsules consisting of a calcium carbonate core template surrounded by shells containing magnetite nanoparticles and ethanol-soluble polyimide brushes with polymethacrylic acid side chains were assembled using a layer-by-layer technique under nonaqueous conditions. These microcapsules represent a potential solution to the challenging problem of encapsulating water-soluble compounds, particularly low molecular weight drugs. It was possible to move these microcapsules with magnetite nanoparticles in their shells by applying a magnetic field gradient. The novel microcapsules were characterized by optical microscopy, atomic force microscopy, and scanning electron microscopy. Using the brush-like polyanions instead of linear polyanions made it possible to increase the shell thickness gain per ionic assembly cycle by a factor of ~3.

Original languageEnglish
Article number202
JournalJournal of Polymer Research
Volume22
Issue number10
DOIs
Publication statusPublished - 1 Oct 2015
Externally publishedYes

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Keywords

  • Layer-by-layer assembling
  • Magnetite nanoparticles
  • Nanocomposite microcapsules
  • Polyimide brushes

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

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