Structural formation of oil-in-water (O/W) and water-in-oil-in-water (W/O/W) droplets in PDMS device using protrusion channel without hydrophilic surface treatment

Dong Hyun Yoon; Daiki Tanaka; Tetsushi Sekiguchi; Shuichi Shoji

doi:10.3390/mi9090468

Structural formation of oil-in-water (O/W) and water-in-oil-in-water (W/O/W) droplets in PDMS device using protrusion channel without hydrophilic surface treatment

Dong Hyun Yoon^*, Daiki Tanaka, Tetsushi Sekiguchi, Shuichi Shoji

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

This paper presents a simple method of droplet formation using liquids that easily wet polydimethylsiloxane (PDMS) surfaces without any surface treatment. Using only structural features and uniform flow focusing, Oil-in-Water (O/W) and Water-in-Oil-in-Water (W/O/W) droplets were formed in the full PDMS structure. Extrusion channel and three-dimensional flow focusing resulted in effective fluidic conditions for droplet formation and the droplet size could be precisely controlled by controlling the flow rate of each phase. The proposed structure can be utilized as an important element for droplet based research, as well as a droplet generator.

Original language	English
Article number	468
Journal	Micromachines
Volume	9
Issue number	9
DOIs	https://doi.org/10.3390/mi9090468
Publication status	Published - 2018

Keywords

Double emulsion
Microdroplet
Polydimethylsiloxane
Three-dimensional structure

ASJC Scopus subject areas

Control and Systems Engineering
Mechanical Engineering
Electrical and Electronic Engineering

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10.3390/mi9090468

Cite this

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title = "Structural formation of oil-in-water (O/W) and water-in-oil-in-water (W/O/W) droplets in PDMS device using protrusion channel without hydrophilic surface treatment",

abstract = "This paper presents a simple method of droplet formation using liquids that easily wet polydimethylsiloxane (PDMS) surfaces without any surface treatment. Using only structural features and uniform flow focusing, Oil-in-Water (O/W) and Water-in-Oil-in-Water (W/O/W) droplets were formed in the full PDMS structure. Extrusion channel and three-dimensional flow focusing resulted in effective fluidic conditions for droplet formation and the droplet size could be precisely controlled by controlling the flow rate of each phase. The proposed structure can be utilized as an important element for droplet based research, as well as a droplet generator.",

keywords = "Double emulsion, Microdroplet, Polydimethylsiloxane, Three-dimensional structure",

author = "Yoon, {Dong Hyun} and Daiki Tanaka and Tetsushi Sekiguchi and Shuichi Shoji",

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language = "English",

volume = "9",

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T1 - Structural formation of oil-in-water (O/W) and water-in-oil-in-water (W/O/W) droplets in PDMS device using protrusion channel without hydrophilic surface treatment

AU - Yoon, Dong Hyun

AU - Tanaka, Daiki

AU - Sekiguchi, Tetsushi

AU - Shoji, Shuichi

PY - 2018

Y1 - 2018

N2 - This paper presents a simple method of droplet formation using liquids that easily wet polydimethylsiloxane (PDMS) surfaces without any surface treatment. Using only structural features and uniform flow focusing, Oil-in-Water (O/W) and Water-in-Oil-in-Water (W/O/W) droplets were formed in the full PDMS structure. Extrusion channel and three-dimensional flow focusing resulted in effective fluidic conditions for droplet formation and the droplet size could be precisely controlled by controlling the flow rate of each phase. The proposed structure can be utilized as an important element for droplet based research, as well as a droplet generator.

AB - This paper presents a simple method of droplet formation using liquids that easily wet polydimethylsiloxane (PDMS) surfaces without any surface treatment. Using only structural features and uniform flow focusing, Oil-in-Water (O/W) and Water-in-Oil-in-Water (W/O/W) droplets were formed in the full PDMS structure. Extrusion channel and three-dimensional flow focusing resulted in effective fluidic conditions for droplet formation and the droplet size could be precisely controlled by controlling the flow rate of each phase. The proposed structure can be utilized as an important element for droplet based research, as well as a droplet generator.

KW - Double emulsion

KW - Microdroplet

KW - Polydimethylsiloxane

KW - Three-dimensional structure

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Structural formation of oil-in-water (O/W) and water-in-oil-in-water (W/O/W) droplets in PDMS device using protrusion channel without hydrophilic surface treatment

Abstract

Keywords

ASJC Scopus subject areas

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