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A pure aqueous route to mesoporous silica thin films via dip-coating of prefabricated hybrid micelles

Abstract : Mesoporous thin films were prepared by dipcoating with a purely aqueous method, as a substitute for the alcohol-based evaporation-induced self-assembly route. Unlike other aqueous routes that require a very slow pulling rate possible only using high performance dip-coaters, as a result of the high surface tension of water, this new process works with standard dip-coaters and at similar pulling rates as are used for the evaporation-induced self-assembly route. This unique asset is the result of the synthesis of prefabricated self-assembled silicate/organic hybrid micelles. These building blocks are concentrated before use, which provides a gelling edge after moderate evaporation. As a result, defect-free continuous mesoporous films with wellorganized hexagonally packed pores were prepared after optimization of both the evaporation rate of the solution of hybrid micelles and the dip-coater pulling rate.
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https://hal.sorbonne-universite.fr/hal-02127819
Contributor : Cedric Boissiere <>
Submitted on : Monday, May 13, 2019 - 5:16:40 PM
Last modification on : Wednesday, September 23, 2020 - 4:33:34 AM

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Heiko Zschiedrich, Patricia Kooyman, Eric Prouzet, Cédric Boissière. A pure aqueous route to mesoporous silica thin films via dip-coating of prefabricated hybrid micelles. Journal of Sol-Gel Science and Technology, Springer Verlag, 2017, 81 (2), pp.514-522. ⟨10.1007/s10971-016-4221-y⟩. ⟨hal-02127819⟩

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