To provide a method for producing hollow silica particles, which is capable of stably producing hollow silica particles even in the case when the silica concentration converted from a silica source in a reaction liquid is high.
The method for producing hollow silica particles comprises: a step of forming an aqueous dispersion of emulsified oil droplets containing a hydrophobic organic compound by applying supersonic vibration to a mixed liquid containing the hydrophobic organic compound, a polyvinyl alcohol, and an aqueous solvent; a step of forming an outer shell part constituted of a component containing silica and having a mesoporous structure, on the surface of each emulsified oil droplet, in a reaction liquid obtained by mixing the aqueous dispersion of the emulsified oil droplets and a silica source in the presence of a cationic surfactant; and a step of removing the emulsified oil drops from composite silica particles each including the outer shell part and the emulsified oil droplet existing on the inner side of the outer shell part.
KOMATSU MASAKI
KUWABARA KAZUO
Next Patent: METHOD FOR PRODUCING HOLLOW SILICA PARTICLE