4 research outputs found
A facile route for the synthesis of sub-micron sized hollow and multiporous organosilica spheres
We present a facile route for the synthesis of sub-micron sized hollow and multiporous organosilica spheres, which is based on an oil-in-water emulsion and merely uses one organosilica precursor-phenyl trimethoxysilane-that serves as monomer, precursor for a surface active species and oil phase. This journal is © the Partner Organisations 2014
Facile and Versatile Platform Approach for the Synthesis of Submicrometer-Sized Hybrid Particles with Programmable Size, Composition, and Architecture Comprising Organosiloxanes and/or Organosilsesquioxanes
We present a facile and versatile
platform approach for the synthesis
of submicrometer-sized hybrid particles based on an oil-in-water emulsion.
These particles comprise organosiloxanes and/or organosilsesquioxanes
formed via hydrolysis and polycondensation of alkyl- or aryltrimethoxysilane,
and polystyrene or poly(methyl methacrylate) formed through radical
polymerization of styrene and methyl methacrylate, respectively. In
this synthesis, the alkyl- or aryltrimethoxysilane fulfills three
different roles: (i) it is part of the oil phase, (ii) serves as monomer
for the formation of the organosiloxane network, and (iii) forms a
surface active species that stabilizes the emulsion. Size, composition
and architecture of the resulting hybrid particles are programmable
in this synthetic approach, as demonstrated for the combination phenyltrimethoxysilane/styrene.
The versatility of the approach is demonstrated by preparing hybrid
particles based on following precursor/monomer combinations: phenyltrimethoxysilane/methyl
methacrylate, methyltrimethoxysilane/styrene, (3-acryloxypropyl)trimethoxysilane/styrene
and (3-mercaptopropyl)trimethoxysilane/styrene. Latter combination
yields hybrid spheres with thiol groups suited for further functionalization