Synthesis of Core-Shell Structured Dual-Mesoporous Silica Spheres with Tunable Pore Size and Controllable Shell Thickness

被引：267

作者：

Niu, Dechao ^{[1
]}

Ma, Zhi ^{[2
]}

Li, Yongsheng ^{[1
]}

Shi, Jianlin ^{[1
,3
]}

机构：

[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Organ Chem, Shanghai 200032, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 43期

基金：

中国国家自然科学基金;

关键词：

HOLLOW SPHERES; NANOPARTICLES; MONOLITHS; TRANSFORMATION; SOLVENT; SYSTEM; ROUTE; FOAMS;

D O I：

10.1021/ja1070653

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Core-shell structured dual-mesoporous silica spheres (DMSS) that possess smaller pores (2.0 nm) in the shell and larger tunable pores (12.8-18.5 nm) in the core have been successfully synthesized by utilizing an amphiphilic block copolymer (polystyrene-b-poly (acrylic acid), PS-b-PAA) and cetyl trimethyl ammonium bromide (CTAB) as cotemplates. The thickness of the shells and the larger pore size in the core could be easily tuned by changing the amounts of TEOS and the hydrophobic block (PS) length during synthesis, respectively. By encapsulating hydrophobic magnetite nanoparticles into the cores, superparamagnetic dual-mesoporous silica spheres were obtained. Drug storage and release testing results showed that the diffusing rate of the stored drug could be efficiently controlled by changing the shell thickness of DMSS.

引用

页码：15144 / 15147

页数：4

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