Title |
Controlled Generation of Ultrathin‐Shell Double Emulsions and Studies on Their Stability
|
---|---|
Published in |
ChemPhysChem, March 2017
|
DOI | 10.1002/cphc.201601334 |
Pubmed ID | |
Authors |
Chun‐Xia Zhao, Dong Chen, Yue Hui, David A. Weitz, Anton P. J. Middelberg |
Abstract |
Double emulsions with a hierarchical core-shell structure have great potential in various applications, but their broad application is limited by their instability. To improve stability, water-in-oil-in-water emulsions (W/O/W) with an ultra-thin oil layer of several-hundred nanometers were produced using a microcapillary device. We investigated the effects of various parameters on the generation of ultra-thin-shell double emulsions and their droplet size, including the proper combinations of inner, middle and outer phases, flow rates and surfactants. The surfactant in the middle oil phase was found to be critical for the formation of the ultra-thin-shell double emulsions. Furthermore, the stability of these double emulsions can be notably improved by increasing the concentration of the surfactant and they can be stable over months. This opens up new opportunities for their future applications in cosmetics, foods, and pharmaceuticals. |
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