Next Article in Journal
A New Microfluidic Device for Classification of Microalgae Cells Based on Simultaneous Analysis of Chlorophyll Fluorescence, Side Light Scattering, Resistance Pulse Sensing
Next Article in Special Issue
A Microfluidic Chip for Cell Patterning Utilizing Paired Microwells and Protein Patterns
Previous Article in Journal
Tunable Particle Focusing in a Straight Channel with Symmetric Semicircle Obstacle Arrays Using Electrophoresis-Modified Inertial Effects
Previous Article in Special Issue
Development of a Multi-Stage Electroosmotic Flow Pump Using Liquid Metal Electrodes
Open AccessArticle

A Dewetting Model for Double-Emulsion Droplets

by Zhanxiao Kang 1,2, Pingan Zhu 1,2, Tiantian Kong 2,3 and Liqiu Wang 1,2,*
Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
Zhejiang Institute of Research and Innovation, The University of Hong Kong (HKU-ZIRI), Hangzhou 311300, Zhejiang, China
Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, Shenzhen University, 3688 Nanhai Avenue, Shenzhen 518060, China
Author to whom correspondence should be addressed.
Academic Editors: Yongxin Song, Junsheng Wang and Dongqing Li
Micromachines 2016, 7(11), 196;
Received: 1 September 2016 / Revised: 21 October 2016 / Accepted: 27 October 2016 / Published: 1 November 2016
The evolution of double-emulsion droplets is of great importance for the application of microdroplets and microparticles. We study the driving force of the dewetting process, the equilibrium configuration and the dewetting time of double-emulsion droplets. Through energy analysis, we find that the equilibrium configuration of a partial engulfed droplet depends on a dimensionless interfacial tension determined by the three relevant interfacial tensions, and the engulfing part of the inner phase becomes larger as the volume of the outer phase increases. By introducing a dewetting boundary, the dewetting time can be calculated by balancing the driving force, caused by interfacial tensions, and the viscous force. Without considering the momentum change of the continuous phase, the dewetting time is an increasing function against the viscosity of the outer phase and the volume ratio between the outer phase and inner phase. View Full-Text
Keywords: double emulsion; dewetting force; equilibrium configuration; dewetting time double emulsion; dewetting force; equilibrium configuration; dewetting time
Show Figures

Graphical abstract

MDPI and ACS Style

Kang, Z.; Zhu, P.; Kong, T.; Wang, L. A Dewetting Model for Double-Emulsion Droplets. Micromachines 2016, 7, 196.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop