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Gewählte Publikation:

Willinger, M; Felhofer, M; Reimhult, E; Zirbs, R.
(2021): Method for High-Yield Hydrothermal Growth of Silica Shells on Nanoparticles
MATERIALS. 2021; 14(21), 6646 FullText FullText_BOKU

Abstract:
Coating processes are commonly used in materials science to protect a core or modify material properties. We describe a hydrothermal coating process using TEOS (tetraethyl orthosilicate), a widely used precursor for silica coatings, on three representative template materials (carbon nanotubes, silica, and polystyrene nanoparticles) with different properties and shapes. We compare the efficiency of previously published protocols for silica coatings at room temperature and atmospheric pressure with the hydrothermal process at 160 & DEG;C and 3 bar. The hydrothermal method achieves higher yields and thicker silica coatings with the same amount of precursor when compared to the conventional way, thus offering higher effectiveness. Furthermore, the hydrothermal coating process yields more homogeneous shells with a higher density, making hydrothermal coating the method of choice when mechanical integrity and low permeability of the coating are required.
Autor*innen der BOKU Wien:
Reimhult Erik
Willinger Max
Zirbs Ronald
BOKU Gendermonitor:


Find related publications in this database (Keywords)
hydrothermal synthesis
coating
silica
carbon nanotubes
polystyrene
surfactant-assisted


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