The role of Di(2-ethylhexyl)phosphoric acid as a cosurfactant on the morphology control of mesoporous silica microspheres.
Synthesis of mesoporous silica microspheres larger than 10 microm via surfactant template approach has rarely been reported. According to the previous studies, particle morphologies were highly variable, depending on the synthesis conditions and impeller design such as impeller type, size, and agitation speed. A new robust surfactant-template synthesis strategy for the stable suspension of large silica microspheres was investigated by introducing an additional cosurfactant. Di(2-ethylhexyl)phosphoric acid (HDEHP) as a cosurfactant played a key role in suspension stabilization without distorting the spherical morphology as well as in the formation of uniform pore structures. High quality of mesoporous silica microspheres was obtained and compared with the Kosuge's silica under different conditions such as stirring rate, acid concentration, the amount of solvent in a mother liquor.
Kim
Jong-Yun
JY
Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 305-353 Daejeon, Korea.
Yoon
Suk Bon
SB
Lee
Myung-Ho
MH
Park
Yong Joon
YJ
Kim
Won-Ho
WH
Jee
Kwang Yong
KY
D003102:Colloids / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008863:Microspheres; D008968:Molecular Conformation; D010755:Organophosphates / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*
D003102:Colloids; D046911:Macromolecular Substances; D010755:Organophosphates; D013501:Surface-Active Agents; C007377:di-2-(ethylhexyl)phosphoric acid; D012822:Silicon Dioxide