| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
The synthesis method of hollow mesoporous silicas by selective removal of core from core-shell structure was developed. Hydrophobic shell of propyl-group grafted mesoporous silica was formed on hydrophilic core spheres of pure mesoporous silica by particle overgrowth. The core-shell structured spheres were treated with an aqueous ammonia solution with cationic surfactants to remove core selectively. Addition of the hollow spheres as microreactors to two-phase reactions increased reaction rates. Modification of the hollow spheres with phenyl groups further increased the reaction rate. Stirring caused the hollow spheres containing the aqueous phase to be transferred into the organic phase and oil droplets formed in the water phase, causing the reaction rate to be increased. Modifying the mesopore walls with phenyl groups to make the spheres highly hydrophobic increased the amount of spheres that was present in the organic phase, increasing the reaction rate.
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