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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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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-302D-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-302E-E
Genre: Book Chapter

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 Creators:
Polenz, Ingmar1, Author              
Brosseau, Quentin1, Author              
Baret, Jean-Christophe1, Author              
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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Free keywords: microfluidics; in situ encapsulation; polyurea; interfacial polymerization kinetics
 Abstract: 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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Language(s): eng - English
 Dates: 2015
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.piutam.2015.03.014
 Degree: -

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Source 1

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Title: IUTAM Symposium on Dynamics of Capsules, Vesicles and Cells in Flow
Source Genre: Book
 Creator(s):
BarthesBiesel, D., Editor
Blyth, M. G., Editor
Salsav, A. V., Editor
Affiliations:
-
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -

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Title: Procedia IUTAM
Source Genre: Series
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 16 Sequence Number: - Start / End Page: 115 - 122 Identifier: -