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Hierarchical Meso-Mesoporous and Macro-Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer

Abstract : We report here the synthesis of different kinds of hierarchical porous silica materials by using mixtures of an amphiphilic block copolymer (Pluronic P123) and a nonionic fluorinated surfactant. In particular, we have taken advantage of the difference in polarities between the two compounds to design dual-mesoporous materials through the cooperative templating mechanism (CTM). We have undertaken a complete study of this system by varying the composition of the mixed micelles and the synthesis conditions. We have shown that both the dual-mesoporosity and the mesopore ordering are favored when materials are prepared with fluorine-rich and P123-rich micelles. However, when the P123-rich micelles predominate, the mesostructure is less organized and the dual-porosity depends on the P123 content. In addition, concentrated emulsions were formed by incorporating perfluorodecalin (PFD) in the surfactant mixture, and hierarchical macro-mesoporous materials were prepared by combining the CTM and the emulsion templating mechanism.
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https://hal.univ-lorraine.fr/hal-01496646
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Submitted on : Monday, March 27, 2017 - 4:47:33 PM
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Anna May-Masnou, Marie-José Stebe, Jean-Luc Blin. Hierarchical Meso-Mesoporous and Macro-Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer. European Journal of Inorganic Chemistry, Wiley-VCH Verlag, 2016, pp.1998-2005. ⟨10.1002/ejic.201501168⟩. ⟨hal-01496646⟩

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