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Mineralization of water-in-oil emulsion droplets

Published online by Cambridge University Press:  01 February 2011

Giulia Fornasieri ,
Stéphane Badaire ,
Rénal Vasco Backov ,
Philippe Poulin ,
Cécile Zakri  and
Olivier Mondain-Monval
Giulia Fornasieri
Affiliation:
Centre de Recherche Paul Pascal - CNRS, Avenue Albert Schweitzer, 33600 Pessac, Francemondain@crpp-bordeaux.cnrs.fr
Stéphane Badaire
Affiliation:
Centre de Recherche Paul Pascal - CNRS, Avenue Albert Schweitzer, 33600 Pessac, Francemondain@crpp-bordeaux.cnrs.fr
Rénal Vasco Backov
Affiliation:
Centre de Recherche Paul Pascal - CNRS, Avenue Albert Schweitzer, 33600 Pessac, Francemondain@crpp-bordeaux.cnrs.fr
Philippe Poulin
Affiliation:
Centre de Recherche Paul Pascal - CNRS, Avenue Albert Schweitzer, 33600 Pessac, Francemondain@crpp-bordeaux.cnrs.fr
Cécile Zakri
Affiliation:
Centre de Recherche Paul Pascal - CNRS, Avenue Albert Schweitzer, 33600 Pessac, Francemondain@crpp-bordeaux.cnrs.fr
Olivier Mondain-Monval
Affiliation:
Centre de Recherche Paul Pascal - CNRS, Avenue Albert Schweitzer, 33600 Pessac, Francemondain@crpp-bordeaux.cnrs.fr
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Extract

Using reverse emulsion systems, we were able to trigger mineralization confined at an oil-water interface. In this process, the alcoxide silica precursor is dissolved in the oil continuous phase of the emulsion and diffuses through the bulk to the interface where it starts to hydrolyze and condense as soon as a certain concentration threshold is attained. The process takes place only in the presence of a water soluble surfactant inside the droplet. This surfactant leads to the presence of a controlled mesoporosity inside the silica shells. The obtained objects could be used in different encapsulation applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 847: Symposium EE – Organic/Inorganic Hybrid Materials , 2004 , EE3.5
Copyright
Copyright © Materials Research Society 2005

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References

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