Photopolymerization of complex emulsions with irregular shapes fabricated by multiplex coaxial flow focusing

We fabricate complex emulsions with irregular shapes in the microscale by a simple but effective multiplex coaxial flow focusing process. A multiphase cone-jet structure is steadily formed, and the compound liquid jet eventually breaks up into Janus microdroplets due to the perturbations propagating...

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Bibliographic Details
Published in:Applied physics letters 2018-02, Vol.112 (7)
Main Authors: Wu, Qiang, Yang, Chaoyu, Yang, Jianxin, Huang, Fangsheng, Liu, Guangli, Zhu, Zhiqiang, Si, Ting, Xu, Ronald X.
Format: Article
Language:English
Subjects:
Applied physics
Coaxial flow
Drug delivery systems
Emulsions
Microparticles
Multiplexing
Photopolymerization
Ultraviolet radiation
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Summary:We fabricate complex emulsions with irregular shapes in the microscale by a simple but effective multiplex coaxial flow focusing process. A multiphase cone-jet structure is steadily formed, and the compound liquid jet eventually breaks up into Janus microdroplets due to the perturbations propagating along the jet interfaces. The microdroplet shapes can be exclusively controlled by interfacial tensions of adjacent phases. Crescent-moon-shaped microparticles and microcapsules with designated structural characteristics are further produced under ultraviolet light of photopolymerization after removing one hemisphere of the Janus microdroplets. These complex emulsions have potential applications in bioscience, food, functional materials, and controlled drug delivery.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5018207