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Influence of the block length of triblock copolymers on th formation of mesoporous silica

Flodström, Katarina LU and Alfredsson, Viveka LU (2003) In Microporous and Mesoporous Materials 59(2-3). p.167-176
Abstract
The effect of different block lengths of Pluronic surfactants, (EO)(x)-(PO)(y)-(EO)(x), in the formation of mesoporous silica has been investigated. The syntheses were performed in micellar solution of the surfactant under acidic conditions. The materials were characterized by SAXS, TEM and nitrogen adsorption measurements. The EO-block length of the polymers determines the mesostructure of the silica. For the hexagonal material (SBA-15) the wall thickness is largely dependent on the length of the EO-blocks, while the PO-block length has a great effect on the pore diameter. Furthermore, the PO-block length influences the templating ability, as longer PO-blocks result in more highly ordered domai

s and well defined particles. The... (More)
The effect of different block lengths of Pluronic surfactants, (EO)(x)-(PO)(y)-(EO)(x), in the formation of mesoporous silica has been investigated. The syntheses were performed in micellar solution of the surfactant under acidic conditions. The materials were characterized by SAXS, TEM and nitrogen adsorption measurements. The EO-block length of the polymers determines the mesostructure of the silica. For the hexagonal material (SBA-15) the wall thickness is largely dependent on the length of the EO-blocks, while the PO-block length has a great effect on the pore diameter. Furthermore, the PO-block length influences the templating ability, as longer PO-blocks result in more highly ordered domai

s and well defined particles. The synthesis temperature also influences these parameters. (C) 2003 Elsevier Science Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Silica, Mesoporous, Pluronics, Block copolymers, Chain length
in
Microporous and Mesoporous Materials
volume
59
issue
2-3
pages
167 - 176
publisher
Elsevier
external identifiers
  • wos:000182873700010
  • scopus:0038238451
ISSN
1387-1811
DOI
10.1016/S1387-1811(03)00308-1
language
English
LU publication?
yes
id
574f32da-bd44-4d6d-ae3a-1edce50b043a (old id 121987)
date added to LUP
2007-07-11 11:28:24
date last changed
2018-01-07 08:43:39
@article{574f32da-bd44-4d6d-ae3a-1edce50b043a,
  abstract     = {The effect of different block lengths of Pluronic surfactants, (EO)(x)-(PO)(y)-(EO)(x), in the formation of mesoporous silica has been investigated. The syntheses were performed in micellar solution of the surfactant under acidic conditions. The materials were characterized by SAXS, TEM and nitrogen adsorption measurements. The EO-block length of the polymers determines the mesostructure of the silica. For the hexagonal material (SBA-15) the wall thickness is largely dependent on the length of the EO-blocks, while the PO-block length has a great effect on the pore diameter. Furthermore, the PO-block length influences the templating ability, as longer PO-blocks result in more highly ordered domai<br/><br>
s and well defined particles. The synthesis temperature also influences these parameters. (C) 2003 Elsevier Science Inc. All rights reserved.},
  author       = {Flodström, Katarina and Alfredsson, Viveka},
  issn         = {1387-1811},
  keyword      = {Silica,Mesoporous,Pluronics,Block copolymers,Chain length},
  language     = {eng},
  number       = {2-3},
  pages        = {167--176},
  publisher    = {Elsevier},
  series       = {Microporous and Mesoporous Materials},
  title        = {Influence of the block length of triblock copolymers on th formation of mesoporous silica},
  url          = {http://dx.doi.org/10.1016/S1387-1811(03)00308-1},
  volume       = {59},
  year         = {2003},
}