Modification of nanosilica particles with hydrophobic modifier bis[3-(triethoxysilyl)propyl]tetrasulfide by using micro-injection in aqueous solutions

Effective modification of nanosilica particles in aqueous solution with the hydrophobic modifier bis[3-(triethoxysilyl)propyl]-tetrasulfide (Si69) was developed. The modification was carried out through the route of aqueous mixing, spray drying, and thermal treatment. The Si69 hydrolysate was maintained at a low concentration by using micro-injection and well mixed with the nanosilica particles to increase the hydrolysate grafting density on the...