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Novel Micro- and Nano-particles Cellulose Based Pickering Emulsions.

Published online by Cambridge University Press:  17 October 2011

Isabelle Capron ,
Hervé Bizot ,
Solène Grosbois ,
Heiko Winter  and
Bernard Cathala
Isabelle Capron
Affiliation:
UR 1268 Biopolymères, Interactions, Assemblages – INRA – F44316 Nantes
Hervé Bizot
Affiliation:
UR 1268 Biopolymères, Interactions, Assemblages – INRA – F44316 Nantes
Solène Grosbois
Affiliation:
UR 1268 Biopolymères, Interactions, Assemblages – INRA – F44316 Nantes
Heiko Winter
Affiliation:
UR 1268 Biopolymères, Interactions, Assemblages – INRA – F44316 Nantes
Bernard Cathala
Affiliation:
UR 1268 Biopolymères, Interactions, Assemblages – INRA – F44316 Nantes
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Abstract

Emulsions are usually metastable systems of two non-miscible phases stabilized by surface active species like surfactant molecules. Emulsions stabilized by solid colloidal particles adsorbed at the interface (Pickering emulsions) offer some competitive advantages with respect to classical emulsions. Most studies published up to now concern emulsions stabilized by inorganic (metallic oxides, exfoliated clays, carbonates and phosphates) or polymeric particles while biomass derived alternatives have only been explored to a limited extent. For the first time, we report the stabilization of emulsions by unmodified cellulose nanocrystals [1, 2] . Cellulose nanocrystals were produced from bacterial cellulose and used to form Pickering emulsions. We demonstrate by SEM that the nanocrystals are adsorbed at the oil/water interface. We also study the size distribution of the droplets that was found to range around 4μm in diameter with very narrow dispersity. The stability of the emulsions was also investigated. The fabrication of new armored microparticles exposing cellulose acicular nanocrystals from cellulose nanocrystals opens opportunities to build materials from low cost and environmental friendly resource.

Keywords

nanostructurebiomimetic (assembly)colloid
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1357: Symposium LL – Biomimetic Engineering of Micro- and Nanoparticles , 2011 , mrss11-1357-ll03-03
Copyright
Copyright © Materials Research Society 2011

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References

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