Size‐Dependent Phase Separation in Emulsion Droplets

Phase separation occurs in emulsion droplets containing poly (ethylene glycol) diacrylate (PEGDA), glycerol, and ethanol to form a glycerol‐in‐PEGDA structure, and the phase separation process is found to depend on the droplet size. The mechanism of this size‐dependent phase separation is dependent...

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Bibliographic Details
Published in:Chemphyschem 2018-08, Vol.19 (16), p.1995-1998
Main Authors: Man, Jia, Chien, Steven, Liang, Shuaishuai, Li, Jiang, Chen, Haosheng
Format: Article
Language:English
Subjects:
Droplets
emulsions
Ethanol
Ethylene glycol
Glycerol
Metals
microcapsules
microfluidics
Phase separation
UV curing
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Summary:Phase separation occurs in emulsion droplets containing poly (ethylene glycol) diacrylate (PEGDA), glycerol, and ethanol to form a glycerol‐in‐PEGDA structure, and the phase separation process is found to depend on the droplet size. The mechanism of this size‐dependent phase separation is dependent on the droplet sizes changing the phase separation time by changing the evaporation speed of mutual solvent ethanol, and the relationship between the separation time T and the droplet diameter D is derived as T≈D2, which has been validated by experiment results. According to this finding, the structures of the droplets can be designed by applying UV curing at different stages of the phase separation, and the monodispersity of droplets is necessary to achieve polymerized particles with the same structure. Time to split: The phase separation time of an emulsion droplet is influenced by the droplet size. The relationship between the separation time T and the droplet diameter D is derived as T≈D2.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.201701296