Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio
Large-mesopore silica films with a narrow pore size distribution and high porosity have been obtained by a sol–gel reaction of a silicon oxide precursor (TEOS) and using polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers as templates in an acidic environment. PS-b-PEO copolymers with diffe...
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doaj-e9a0e5537be74a0aa3ed4d0c427586972020-11-24T22:24:07ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862016-10-01711454146010.3762/bjnano.7.1372190-4286-7-137Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratioRoberto Nisticò0Giuliana Magnacca1Sushilkumar A. Jadhav2Dominique Scalarone3University of Torino, Department of Chemistry, Via P. Giuria 7, 10125 Torino, Italy,University of Torino, Department of Chemistry, Via P. Giuria 7, 10125 Torino, Italy,University of Torino, Department of Chemistry, Via P. Giuria 7, 10125 Torino, Italy,University of Torino, Department of Chemistry, Via P. Giuria 7, 10125 Torino, Italy,Large-mesopore silica films with a narrow pore size distribution and high porosity have been obtained by a sol–gel reaction of a silicon oxide precursor (TEOS) and using polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers as templates in an acidic environment. PS-b-PEO copolymers with different molecular weight and composition have been studied in order to assess the effects of the block length on the pore size of the templated silica films. The changes in the morphology of the porous systems have been investigated by transmission electron microscopy and a systematic analysis has been carried out, evidencing the dependence between the hydrophilic/hydrophobic ratio of the two polymer blocks and the size of the final silica pores. The obtained results prove that by tuning the PS/PEO ratio, the pore size of the templated silica films can be easily and finely predicted.https://doi.org/10.3762/bjnano.7.137block copolymerscontrolled porositymesoporous silicasoft templatingsol–gel |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Roberto Nisticò Giuliana Magnacca Sushilkumar A. Jadhav Dominique Scalarone |
spellingShingle |
Roberto Nisticò Giuliana Magnacca Sushilkumar A. Jadhav Dominique Scalarone Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio Beilstein Journal of Nanotechnology block copolymers controlled porosity mesoporous silica soft templating sol–gel |
author_facet |
Roberto Nisticò Giuliana Magnacca Sushilkumar A. Jadhav Dominique Scalarone |
author_sort |
Roberto Nisticò |
title |
Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio |
title_short |
Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio |
title_full |
Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio |
title_fullStr |
Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio |
title_full_unstemmed |
Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio |
title_sort |
polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the ps/peo ratio |
publisher |
Beilstein-Institut |
series |
Beilstein Journal of Nanotechnology |
issn |
2190-4286 |
publishDate |
2016-10-01 |
description |
Large-mesopore silica films with a narrow pore size distribution and high porosity have been obtained by a sol–gel reaction of a silicon oxide precursor (TEOS) and using polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers as templates in an acidic environment. PS-b-PEO copolymers with different molecular weight and composition have been studied in order to assess the effects of the block length on the pore size of the templated silica films. The changes in the morphology of the porous systems have been investigated by transmission electron microscopy and a systematic analysis has been carried out, evidencing the dependence between the hydrophilic/hydrophobic ratio of the two polymer blocks and the size of the final silica pores. The obtained results prove that by tuning the PS/PEO ratio, the pore size of the templated silica films can be easily and finely predicted. |
topic |
block copolymers controlled porosity mesoporous silica soft templating sol–gel |
url |
https://doi.org/10.3762/bjnano.7.137 |
work_keys_str_mv |
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