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Etudes électrochimiques de cinétiques de polycondensation sol-gel et de la fractalité des xérogels

Abstract : 6-triethoxysilane-1-hexyl-ferrocene is stable, able to connect irreversibly with growing polysiloxanes, and has electrochemical properties ; all of this allows using this molecule as a redox probe. Electrochemical studies (cyclic voltammetry, chronoamperometry) confirm the influence of nature of the catalyst in the diffusion coefficients evolution of growing polysiloxanes (gel time and structures of polymers in solution). First results with modified electrodes seem like to link the nature of the catalyst to the last structure of silica xerogels (fractal, isotropic) and their electrochemical properties. For ormosils matrix hybrid sol-gels and titanium/phosphonate hybrid sol-gels, the use of well redox probes allow us to study the evolution of such complex system and show the influence of each of the parameters when this materials are formed.
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https://tel.archives-ouvertes.fr/tel-00133730
Contributor : Ens Cachan Bibliothèque <>
Submitted on : Tuesday, February 27, 2007 - 3:32:07 PM
Last modification on : Monday, February 15, 2021 - 10:51:23 AM
Long-term archiving on: : Saturday, May 14, 2011 - 2:36:26 AM

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  • HAL Id : tel-00133730, version 1

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Sébastien Sallard. Etudes électrochimiques de cinétiques de polycondensation sol-gel et de la fractalité des xérogels. Autre. École normale supérieure de Cachan - ENS Cachan, 2004. Français. ⟨tel-00133730⟩

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