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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 Col·loides Silici Materials porosos Surface chemistry Colloids Silicon 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: http://dx.doi.org/10.1021/la203753q |
It is part of: | Langmuir, 2011, vol. 27, num. 23, p. 14000-14004 |
URI: | http://hdl.handle.net/2445/62771 |
Related resource: | http://dx.doi.org/10.1021/la203753q |
ISSN: | 0743-7463 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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File | Description | Size | Format | |
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604253.pdf | 5.78 MB | Adobe PDF | View/Open |
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