Percolation transition in the porous structure of latex-templated silica monoliths

François Guillemot; Aline Brunet-Bruneau; Elodie Bourgeat-Lami; Jean Pierre Boilot; Etienne Barthel; Thierry Gacoin

doi:10.1016/j.micromeso.2012.12.045

Percolation transition in the porous structure of latex-templated silica monoliths

François Guillemot, Aline Brunet-Bruneau, Elodie Bourgeat-Lami, Jean Pierre Boilot, Etienne Barthel, Thierry Gacoin

Research output: Contribution to journal › Article › peer-review

Abstract

Porous sol-gel silica monoliths are prepared using PMMA nanoparticles, 60 nm in diameter, as sacrificial templates. The pore-structure of the calcined pellets is investigated through nitrogen adsorption to assess the evolution of the porosity when varying the amount of porogen. The latex templated monoliths present a well defined spherical extrinsic porosity and an intrinsic microporosity due to preparation process. As a result of a careful analysis of the adsorption hysteresis, we identify a percolation threshold of the spherical porosity around 30% volume fraction. This phenomenon, similar to the percolation previously observed in latex-templated silica films, opens the way to the use of latex-templated porous silica monoliths with a tailorable and reliable pore structure.

Original language	English
Pages (from-to)	146-150
Number of pages	5
Journal	Microporous and Mesoporous Materials
Volume	172
DOIs	https://doi.org/10.1016/j.micromeso.2012.12.045
Publication status	Published - 12 Mar 2013

Keywords

Adsorption isotherms
Latex templated silica
Mesoporous silica monoliths
Porosity percolation
Sol-gel silica

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10.1016/j.micromeso.2012.12.045

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title = "Percolation transition in the porous structure of latex-templated silica monoliths",

abstract = "Porous sol-gel silica monoliths are prepared using PMMA nanoparticles, 60 nm in diameter, as sacrificial templates. The pore-structure of the calcined pellets is investigated through nitrogen adsorption to assess the evolution of the porosity when varying the amount of porogen. The latex templated monoliths present a well defined spherical extrinsic porosity and an intrinsic microporosity due to preparation process. As a result of a careful analysis of the adsorption hysteresis, we identify a percolation threshold of the spherical porosity around 30\% volume fraction. This phenomenon, similar to the percolation previously observed in latex-templated silica films, opens the way to the use of latex-templated porous silica monoliths with a tailorable and reliable pore structure.",

keywords = "Adsorption isotherms, Latex templated silica, Mesoporous silica monoliths, Porosity percolation, Sol-gel silica",

author = "Fran{\c c}ois Guillemot and Aline Brunet-Bruneau and Elodie Bourgeat-Lami and Boilot, \{Jean Pierre\} and Etienne Barthel and Thierry Gacoin",

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doi = "10.1016/j.micromeso.2012.12.045",

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TY - JOUR

T1 - Percolation transition in the porous structure of latex-templated silica monoliths

AU - Guillemot, François

AU - Brunet-Bruneau, Aline

AU - Bourgeat-Lami, Elodie

AU - Boilot, Jean Pierre

AU - Barthel, Etienne

AU - Gacoin, Thierry

PY - 2013/3/12

Y1 - 2013/3/12

N2 - Porous sol-gel silica monoliths are prepared using PMMA nanoparticles, 60 nm in diameter, as sacrificial templates. The pore-structure of the calcined pellets is investigated through nitrogen adsorption to assess the evolution of the porosity when varying the amount of porogen. The latex templated monoliths present a well defined spherical extrinsic porosity and an intrinsic microporosity due to preparation process. As a result of a careful analysis of the adsorption hysteresis, we identify a percolation threshold of the spherical porosity around 30% volume fraction. This phenomenon, similar to the percolation previously observed in latex-templated silica films, opens the way to the use of latex-templated porous silica monoliths with a tailorable and reliable pore structure.

AB - Porous sol-gel silica monoliths are prepared using PMMA nanoparticles, 60 nm in diameter, as sacrificial templates. The pore-structure of the calcined pellets is investigated through nitrogen adsorption to assess the evolution of the porosity when varying the amount of porogen. The latex templated monoliths present a well defined spherical extrinsic porosity and an intrinsic microporosity due to preparation process. As a result of a careful analysis of the adsorption hysteresis, we identify a percolation threshold of the spherical porosity around 30% volume fraction. This phenomenon, similar to the percolation previously observed in latex-templated silica films, opens the way to the use of latex-templated porous silica monoliths with a tailorable and reliable pore structure.

KW - Adsorption isotherms

KW - Latex templated silica

KW - Mesoporous silica monoliths

KW - Porosity percolation

KW - Sol-gel silica

U2 - 10.1016/j.micromeso.2012.12.045

DO - 10.1016/j.micromeso.2012.12.045

M3 - Article

AN - SCOPUS:84874703460

SN - 1387-1811

VL - 172

SP - 146

EP - 150

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Percolation transition in the porous structure of latex-templated silica monoliths

Abstract

Keywords

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