title: Design of Aerosol Coating Reactors: Precursor Injection.
abstract: Particles are coated with thin shells to facilitate their processing and incorporation into liquid or solid matrixes without altering core particle properties (coloristic, magnetic, etc.). Here, computational fluid and particle dynamics are combined to investigate the geometry of an aerosol reactor for continuous coating of freshly-made titanium dioxide core nanoparticles with nanothin silica shells by injection of hexamethyldisiloxane (HMDSO) vapor downstream of TiO2particle formation. The focus is on the influence of HMDSO vapor jet number and direction in terms of azimuth and inclination jet angles on process temperature and coated particle characteristics (shell thickness and fraction of uncoated particles). Rapid and homogeneous mixing of core particle aerosol and coating precursor vapor facilitates synthesis of core-shell nanoparticles with uniform shell thickness and high coating efficiency (minimal uncoated core and free coating particles).
authors: Particle Technology Laboratory, Institute of Process Engineering Department of Mechanical and Process Engineering ETH Zurich, 8092 Zürich, Switzerland.
authors: Beat
authors: B
authors: Buesser
authors: Sotiris E
authors: SE
authors: Pratsinis
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