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Encapsulation of active compounds is used to shield often-fragile compounds like oils from manufacturing/storage process-induced degradation and decay. We have produced microcapsules whose size is such that they minimize these process interferences with the texture or appearance of the final product. We developed a process that consists of forming droplets by dispersing the emulsion in a stirred alginate bath, and that works with either oil-in-water or water-in-oil emulsions. Alginate crosslinking to form the membrane then produced microcapsules at sizes in the range of 370 to 500 µm. The dispersion protocol was then re-engineered for a millifluidics process in order to control microcapsule size. We thus managed to produce monodisperse capsules size-bracketed to within diameters of 140 µm to 1.4 mm.

Participants

ONIRIS, Science without Borders (Brazil)

Publications

E. Martins, D. Poncelet, M. Marquis, J. Davy, D. Renard (2017) Monodisperse core-shell alginate (micro-)capsules with oil core generated from droplets millifluidic. Food Hydrocolloids, 63, 447-456, https://doi.org/10.1016/j.foodhyd.2016.09.018

E. Martins, D. Renard, Z. Adiwijaya, E. Karaoglan, D. Poncelet (2017) Oil encapsulation in core-shell alginate capsules by inverse gelation. I: Dripping methodology. J. Microencapsulation, 34(1), 82-90, https://doi.org/10.1080/02652048.2017.1284278

E. Martins, D. Poncelet, C.R. Ramires, D. Renard (2017) Oil encapsulation in core-shell alginate capsules by inverse gelation. II. Comparison between dripping techniques using W/O or O/W emulsions. J. Microencapsulation, https://doi.org/10.1080/02652048.2017.1365963

E. Martins, D. Poncelet, D. Renard (2017) A novel method of oil encapsulation in core-shell alginate microcapsules by inverse gelation technique. Reactive and Functional Polymers, 114, 49-57, https://doi.org/10.1016/j.reactfunctpolym.2017.03.006