4.7 Article

Facile fabrication of Janus magnetic microcapsules via double in situ miniemulsion polymerization

Journal

POLYMER CHEMISTRY
Volume 4, Issue 5, Pages 1459-1466

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c2py20863f

Keywords

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Funding

  1. Anhui Provincial Natural Science Foundation [11040606M59]
  2. National Natural Science Foundation of China [21044006, 51173001]
  3. Doctoral Scientific Research Startup Fund [33190129]
  4. Student Research Training Program [2012026, KYXL2012026]
  5. 211 Project of Anhui University of China

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We describe a facile and flexible technique for fabricating Janus magnetic microcapsules via double in situ miniemulsion polymerization. Under a magnetic field, magnetic nanoparticles move to one side of the miniemulsion monomer droplets. After the monomers polymerize, an inorganic tetraethoxysilane (TEOS) phase is compressed and restricted as a liquid core due to the phase separation between TEOS and the growing polymer. After the monomers turn into a polymeric shell and the silica forms completely, the volume of the TEOS phase decreases dramatically leading to a hollow structure. Magnetic nanoparticles are chemically embedded in one side of the microcapsule shell and Janus magnetic microcapsules are fabricated efficiently and conveniently by a one-step method.

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