Using well-defined EOnMAm diblock amphiphilic copolymers as templates for synthesis of mesoporous silicas with different mesostructures

被引：11
作者：
Chan, Yi-Tsu [1 ]
Lin, Hong-Ping [2 ]
Mou, Chung-Yuan [1 ,3 ]
Liu, Shiuh-Tzung [1 ]
机构：
[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
[2] Natl Cheng Kung Univ, Dept Chem, Tainan 701, Taiwan
[3] Natl Taiwan Univ, Ctr Condensed Matter, Taipei 106, Taiwan
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2009年 / 123卷 / 1-3期
关键词：
Diblock copolymer; Mesoporous silica; Amphiphilic polymer; Mesostructure; BLOCK-COPOLYMER; SPHERICAL MESOPORES; CONTROLLED-RELEASE; MOLECULAR-SIEVES; THIN-FILMS; TRANSITION; TRIBLOCK; CARBONS; PORES; OXIDE;
D O I：
10.1016/j.micromeso.2009.04.019
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Highly ordered mesoporous silicas with large accessible pores have been prepared by using pre-synthesized poly(ethylene oxide)-b-poly(methyl acrlyate) (EO(n)MA(m)) diblock copolymers as templates. Via adjusting the chain length of EO versus that of MA, a series of silica mesostructures, including two-dimensional (2-D) hexagonal, 3-D bicontinuous (Ia3d), and body-centered cubic (Im3m) symmetries, were prepared with the use of tetraethyl-orthosilicate (TEOS) as the silica precursor under acidic conditions. The mesostructures of all materials were characterized by small-angle X-ray scattering and transmission electron microscopy measurements. N-2 adsorption-desorption isotherms reveal that the pore size ranges from 4 to 30 nm with a narrow pore-size distribution and its dimension is proportional to the chain length of MA units. (C) 2009 Elsevier Inc. All rights reserved.
引用
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页码：331 / 337
页数：7
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