Layer-by-layer assembly of imogolite nanotubes and polyelectrolytes into core-shell particles and their conversion to hierarchically porous spheres

被引：19
作者：
Kuroda, Yoshiyuki [1 ]
Kuroda, Kazuyuki [1 ,2 ,3 ]
机构：
[1] Waseda Univ, Dept Appl Chem, Fac Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan
[2] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Shinjuku Ku, Tokyo 1698555, Japan
[3] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan
来源：
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2008年 / 9卷 / 02期
关键词：
hierarchically porous materials; layer-by-layer; colloidal templating; core-shell particles; hollow spheres; imogolite; nanotubes;
D O I：
10.1088/1468-6996/9/2/025018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Core-shell particles were prepared by the layer-by-layer (LbL) assembly of imogolite (IMO) nanotubes and poly( sodium 4-styrenesulfonate) (PSS) on polystyrene particles ( diameter: 800 nm) coated preliminarily with poly(diallyldimethylammonium chloride) (PDDA). PSS and imogolite were alternately adsorbed on the particles to form core-shell particles with one to three bilayers of PSS/IMO. Macroporous hollow spheres were formed by removing polystyrene cores via heat treatment or extraction when the number of bilayers was 2 or 3. The sample formed by extraction (the number of bilayer was 3) showed only macroporosity and PSS remained in the shell, whereas the heat-treated sample showed hierarchical micro- and macroporosities. When the diameter of polystyrene particles decreased from 800 nm to 300 or 100 nm, hollow spheres were deformed because of the increase in the relative length of imogolite nanotubes against the size of polystyrene particles. Imogolite is a promising building block of hierarchically porous materials with core-shell morphologies using LbL assembly.
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页数：8
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