silica particles

This work is focused on modification of cellulose filters surface in order to hydrophobise a material and decrease water drop adhesion to its surface. Proposed modification methods include deposition of silica particles to obtain desired material roughness and coating material with 1H,1H,2H,2H-perfluorooctyl triethoxysilane (FOTS) to decrease its surface energy

The research was focused on investigations of the impact of spray-drying (SD) conditions on the morphology and aerosol performance of powders produced from nanocolloidal silica.Microsized nanostructiral particles were characterized by SEM, aerosol spectrometry and pharmaceutical impactor. Results show that proper adjusting of SD process parameters and precursor composition allows to obtain powders of different morphologies: solid or hollow particles with different wall thickness, or particles with a microporous structure with spherical or nonspherical shape.