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Droplet breakup mechanisms in premix membrane emulsification and related microfluidic channels

journal contribution
posted on 08.03.2021, 14:08 by A Nazir, Goran VladisavljevicGoran Vladisavljevic
Premix membrane emulsification (PME) is a pressure driven process of droplet breakup, caused by their motion through membrane pores. The process is widely used for high-throughput production of sized-controlled emulsion droplets and microparticles using low energy inputs. The resultant droplet size depends on numerous process, membrane, and formulation factors such as flow velocity in pores, number of extrusions, initial droplet size, internal membrane geometry, wettability of pore walls, and physical properties of emulsion. This paper provides a comprehensive review of different mechanisms of droplet deformation and breakup in membranes with versatile pore morphologies including sintered glass and ceramic filters, SPG and polymeric membranes with sponge-like structures, micro-engineered metallic membranes with ordered straight-through pore arrays, and dynamic membranes composed of unconsolidated particles. Fundamental aspects of droplet motion and breakup in idealized pore networks have also been covered including droplet disruption in T-junctions, channel constrictions, and obstructed channels. The breakup mechanisms due to shear interactions with pore walls and localized shear (direct breaking) or due to interfacial tension effects and Rayleigh-Plateau instability (indirect breaking) were systematically discussed based on recent experimental and numerical studies. Non-dimensional droplet size correlations based on capillary, Weber, and Ohnesorge numbers were also presented.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Advances in Colloid and Interface Science

Volume

290

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Advances in Colloid and Interface Science and the definitive published version is available at https://doi.org/10.1016/j.cis.2021.102393

Acceptance date

25/02/2021

Publication date

2021-03-02

Copyright date

2021

ISSN

0021-9797

eISSN

0001-8686

Language

en

Depositor

Dr Goran Vladisavljevic. Deposit date: 5 March 2021

Article number

102393