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Encapsulation of In Situ Nanoprecipitated Inorganic Materials in Confined Geometries Into a Polymer Shell Using Inverse Miniemulsion
Author(s) -
Hamberger Anika,
Ziener Ulrich,
Landfester Katharina
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200471
Subject(s) - miniemulsion , dynamic light scattering , polymer , nanoparticle , monomer , chemical engineering , aqueous solution , materials science , polymer chemistry , nanocapsules , aqueous two phase system , chemistry , nanotechnology , organic chemistry , composite material , engineering
Highly insoluble inorganic nanoparticles can be prepared in situ by precipitation inside of aqueous nanodroplets of cosonicated inverse miniemulsions containing salts, which are readily soluble in water. If the different salt droplets are fused, a hardly soluble salt is formed in the dispersed phase with a size considerably smaller than the size of the droplets. Subsequent encapsulation of the nanoparticles into a polymer shell is achieved by an interfacial polyaddition reaction between a polyol present in the aqueous phase and a (second) monomer (2,4‐toluene diisocyanate (TDI)) in the continuous phase. The materials are studied by transmission electron microscopy, X‐ray diffraction, dynamic light scattering (DLS), and TGA.