Volume 14, Issue 41 1803042
Communication

Preparation of Template-Free Robust Yolk–Shell Gelled Particles from Controllably Evolved All-in-Water Emulsions

Jean-Paul Douliez

Corresponding Author

Jean-Paul Douliez

UMR1332, Biologie du Fruit et Pathologie, INRA, University of Bordeaux, Centre de Bordeaux, 33883 Villenave d'Ornon, France

E-mail: [email protected]Search for more papers by this author
Adeline Perro

Adeline Perro

University of Bordeaux, INP Bordeaux, ISM, UMR 5255, site ENSCBP, 16 av. Pey-Berland, 33607 Pessac, France

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Jean-Paul Chapel

Jean-Paul Chapel

CNRS, University of Bordeaux, CRPP, 115 av. A. Schweitzer, 33600 Pessac, France

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Bertrand Goudeau

Bertrand Goudeau

University of Bordeaux, INP Bordeaux, ISM, UMR 5255, site ENSCBP, 16 av. Pey-Berland, 33607 Pessac, France

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Laure Béven

Laure Béven

UMR1332, Biologie du Fruit et Pathologie, INRA, University of Bordeaux, Centre de Bordeaux, 33883 Villenave d'Ornon, France

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First published: 11 September 2018
Citations: 15

Abstract

A template-free all-aqueous bulk preparation of robust hollow capsules having a gelatin shell from all-in-water double emulsions is reported. The hot (>40 °C) quaternary system water/polyethylene glycol (PEG)/gelatin/alginate is shown to spontaneously form PEG-in-gelatin-in-PEG double water emulsion droplets having a multinuclear core. These droplets are stable upon cooling below the temperature at which gelatin gelled. In contrast, above the melting temperature of gelatin, multinuclear double emulsion droplets controllably evolve into stable mononuclear yolk (aqueous PEG)-shell (gelatin) capsules dispersed in the aqueous PEG continuous phase. It is demonstrated that the gelatin shell can accommodate negatively charged latex beads and be re-enforced by glutaraldehyde or silica. These capsules are also shown to encapsulate payloads, suggesting possible applications in microencapsulation, drug delivery, and synthetic biology.

Conflict of Interest

The authors declare no conflict of interest.

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