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.

Nistico', R., Magnacca, G., Jadhav, S., Scalarone, D. (2016). 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, 7(1), 1454-1460 [10.3762/bjnano.7.137].

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

NISTICO', ROBERTO
Primo
;
2016

Abstract

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.
Articolo in rivista - Articolo scientifico
Block copolymers; Controlled porosity; Mesoporous silica; Soft templating; Sol-gel;
English
1454
1460
7
Nistico', R., Magnacca, G., Jadhav, S., Scalarone, D. (2016). 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, 7(1), 1454-1460 [10.3762/bjnano.7.137].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/349616
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