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

CNRS
Laboratoire de Chimie, Catalyse, Polymères et Procédés

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

11 Citations (Scopus)

Résumé

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.

langue originale	Anglais
Pages (de - à)	146-150
Nombre de pages	5
journal	Microporous and Mesoporous Materials
Volume	172
Les DOIs	https://doi.org/10.1016/j.micromeso.2012.12.045
état	Publié - 12 mars 2013

Accès au document

10.1016/j.micromeso.2012.12.045

Contient cette citation

@article{c7fb2f32112e4239ac34ed760bf78450,

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",

year = "2013",

month = mar,

day = "12",

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

language = "English",

volume = "172",

pages = "146--150",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

publisher = "Elsevier B.V.",

}

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

Résumé

Accès au document

Empreinte digitale

Contient cette citation