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  In situ encapsulation kinetics monitored by microfluidics

Polenz, I., Brosseau, Q., & Baret, J.-C. (2015). In situ encapsulation kinetics monitored by microfluidics. In D. BarthesBiesel, M. G. Blyth, & A. V. Salsav (Eds.), IUTAM Symposium on Dynamics of Capsules, Vesicles and Cells in Flow.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-302D-0 Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-302E-E
Genre: Buchkapitel

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 Urheber:
Polenz, Ingmar1, Autor           
Brosseau, Quentin1, Autor           
Baret, Jean-Christophe1, Autor           
Affiliations:
1Max Planck Research Group Droplets, Membranes and Interfaces, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063290              

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Schlagwörter: microfluidics; in situ encapsulation; polyurea; interfacial polymerization kinetics
 Zusammenfassung: We use microfluidic PDMS devices to monitor the encapsulation process occurring at an emulsion droplet interface which is indicated by the changes in the droplet interfacial deformability. Deformations are induced by constriction chambers at the microfluidic chip. This method allows for a precise measurement of in situ microencapsulation early kinetics (below 0.5 s). We study the formation of polyurea microcapsules (PUMCs). Shell formation occurs at the oil-water interface by an immediate reaction of a di-or multi amine dissolved in the aqueous phase and a diisocyanate dissolved in the oil phase. We are able to address the reactivity of certain reactants on the microencapsulation process. We observe that both monomers of this encapsulation contribute differently which is in contrast to the present understanding of the PUMC formation. In addition, we quantify the retarding effect of the interface stabilizing agent (surfactant) on the encapsulation kinetics. Our approach shows that microfluidics is efficient for monitoring and studying in situ encapsulations up to the potential for the determination of interfacial polymerization kinetics for the generation of microcapsules with well-defined properties and the study of soft reactive interfaces

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Sprache(n): eng - English
 Datum: 2015
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.piutam.2015.03.014
 Art des Abschluß: -

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Titel: IUTAM Symposium on Dynamics of Capsules, Vesicles and Cells in Flow
Genre der Quelle: Buch
 Urheber:
BarthesBiesel, D., Herausgeber
Blyth, M. G., Herausgeber
Salsav, A. V., Herausgeber
Affiliations:
-
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: - Identifikator: -

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Titel: Procedia IUTAM
Genre der Quelle: Reihe
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Amsterdam : Elsevier
Seiten: - Band / Heft: 16 Artikelnummer: - Start- / Endseite: 115 - 122 Identifikator: -