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Title: Coexistence of Two Kinds of Fluorinated Hydrogenated Micelles as Building Blocks for the Design of Bimodal Mesoporous Silica with Two Ordered Mesopore Networks
Author: May Masnou, Anna
Stébé, Marie José
Gutiérrez González, José María, 1953-
Blin, Jean-Luc
Keywords: Química de superfícies
Materials porosos
Surface chemistry
Porous materials
Issue Date: 2011
Publisher: American Chemical Society
Abstract: A simple and effective route has been developed for the synthesis of bimodal (3.6 and 9.4 nm) mesoporous silica materials that have two ordered interconnected pore networks. Mesostructures have been prepared through the self assembly mechanism by using a mixture of polyoxyethylene fluoroalkyl ether and triblock copolymer as building block. The investigation of the RF8(EO)9/P123/water phase diagram evidences that in the considered surfactant range of concentrations, the system is micellar (L1). DLS measurements indicate that this micellar phase is composed of two types of micelles, the size of the first one at around 7.6 nm corresponds unambiguously to the pure fluorinated micelles. The second type of micelles at higher diameter consists of fluorinated micelles which have accommodated a weak fraction of P123 molecules. Thus, in this study the bimodal mesoporous silica are really templated by two kinds of micelles.
Note: Versió postprint del document publicat a:
It is part of: Langmuir, 2011, vol. 27, num. 23, p. 14000-14004
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ISSN: 0743-7463
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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