| 摘要 |
PROBLEM TO BE SOLVED: To provide an efficient production method of mesoporous silica particles having two or more kinds of pore periodic intervals and the mesoporous silica particles. SOLUTION: The production method of the mesoporous silica particles includes a step of adding a silica source (c) and a second surfactant into a dispersion (A) containing composite silica particles produced using a first surfactant as a template with time for reaction, wherein the first surfactant and the second surfactant are respectively quaternary ammonium salts expressed by one of formula (1) and formula (2), the first surfactant is different from the second surfactant and the mesoporous silica particle has two or more kinds of the pore periodic intervals, where formula (1) is [R<SP>1</SP>(R<SP>3</SP>)<SB>3</SB>N]<SP>+</SP>X<SP>-</SP>and formula (2) is [R<SP>1</SP>R<SP>2</SP>(R<SP>3</SP>)<SB>2</SB>N]<SP>+</SP>X<SP>-</SP>, in the formula, each of R<SP>1</SP>and R<SP>2</SP>expresses independently a 4-22C alkyl group, R<SP>3</SP>expresses a 1-3C alkyl group and X expresses a univalent anion. COPYRIGHT: (C)2010,JPO&INPIT |
