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Issue 13, 2018
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Scalable production of double emulsion drops with thin shells

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Double emulsions are often used as containers to perform high throughput screening assays and as templates for capsules. These applications require double emulsions to be mechanically stable such that they do not coalesce during processing and storage. A possibility to increase their stability is to reduce the thickness of their shells to sufficiently low values that lubrication effects hinder coalescence. However, the controlled fabrication of double emulsions with such thin shells is difficult. Here, we introduce a new microfluidic device, the aspiration device, that reduces the shell thickness of double emulsions down to 240 nm at a high throughput; thereby, the shell volume is reduced by up to 95%. The shell thickness of the resulting double emulsions depends on the pressure profile in the device and hence on the fluid flow rates in the channels and is independent of the shell thickness of the injected double emulsions. Therefore, this device enables converting double emulsions with polydisperse shell thicknesses into double emulsions with well-defined, uniform thin shells.

Graphical abstract: Scalable production of double emulsion drops with thin shells

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Publication details

The article was received on 19 Mar 2018, accepted on 01 Jun 2018 and first published on 05 Jun 2018

Article type: Paper
DOI: 10.1039/C8LC00282G
Citation: Lab Chip, 2018,18, 1936-1942
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    Scalable production of double emulsion drops with thin shells

    A. Vian, B. Reuse and E. Amstad, Lab Chip, 2018, 18, 1936
    DOI: 10.1039/C8LC00282G

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