Water-in-oil emulsion separation within a milli-fluidic device

Tesfai, Janet; Perry, Renee N.; Jablonski, Erin L.

doi:10.1016/j.jcis.2010.11.053

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…R y at 65 mm in TAPM A was greater than that in TAPM B, corresponding to the fact that the height of the former was smaller than that of the latter. And this result was consistent with many published literatures [12,13,14,15,23,24], which have put forward the inference of liquid-liquid phase separation by droplet coalescence in a confined microfluidics process since 2007.…”

Section: Resultssupporting

confidence: 92%

Demulsification of Kerosene/Water Emulsion in the Transparent Asymmetric Plate-Type Micro-Channel

Ruan

Hamiti

et al. 2018

Micromachines

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Asymmetric plate-type micro-channels (APM) have one hydrophobic wall and one hydrophilic wall. By flowing through APM, a kerosene-in-water emulsion can be de-emulsified in one second. To date, however, the demulsification process in the APM is still a black box. In order to observe the demulsification process directly, transparent asymmetric plate-type micro-channels (TAPM) were fabricated with two surface-modified glass plates. Emulsions with oil contents of 10%, 30%, and 50% were pumped through TAPM with heights of 39.2 μm and 159.5 μm. The movement and coalescence of oil droplets (the dispersed phase of a kerosene-in-water emulsion) in the TAPM were observed directly with an optical microscope. By analyzing videos and photographs, it was found that the demulsification process included three steps: oil droplets flowed against and were adsorbed on the hydrophobic wall, then oil droplets coalesced to form larger droplets, whereupon the oil phase was separated. The experimental results showed that the demulsification efficiency was approximately proportional to the oil content (30–50%) of the emulsions and increased when the micro-channel height was reduced.

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Section: Resultssupporting

confidence: 92%

Demulsification of Kerosene/Water Emulsion in the Transparent Asymmetric Plate-Type Micro-Channel

Ruan

Hamiti

et al. 2018

Micromachines

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“…Using photolithography, TE can thus be used to fabricate high aspect ratio microstructures on a master mold (as a cheaper alternative to SU-8) for, e.g., PDMS replica molding. 41,73,74 Replica molding with TE materials has to be performed in a mold, which is UV-transparent (at least from one side) to enable photocuring. Traditionally, molds have been fabricated using PDMS, but molds from aluminum and SU-8/silicon wafers covered with a UV-transparent sheet are also applicable.…”

Section: And Fabricationmentioning

confidence: 99%

“…Interestingly, off-stoichiometric formulations improve the quality of photostructured features; the underlying reasons are elaborated in ref . Using photolithography, TE can thus be used to fabricate high aspect ratio microstructures on a master mold (as a cheaper alternative to SU-8) for, e.g., PDMS replica molding. ,, …”

Section: Thiol–ene Polymers: Basics Composition and Fabricationmentioning

confidence: 99%

Thiol–Ene Based Polymers as Versatile Materials for Microfluidic Devices for Life Sciences Applications

Sticker

Geczy

Häfeli

et al. 2020

ACS Appl. Mater. Interfaces

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While there is a steady growth in the number of microfluidics applications, the search for an optimal material that delivers the diverse characteristics needed for the numerous tasks is still nowhere close to being settled. Often overlooked and still underrepresented, the thiol−ene family of polymer materials has an enormous potential for applications in organs-on-a-chip, droplet productions, microanalytics, and point of care testing. In this review, the main characteristics of the thiol−ene materials are given, and advantages and drawbacks with respect to their potential in microfluidic chip fabrication are critically assessed. Select applications, which exploit the versatility of the thiol−ene polymers, are presented and discussed. It is concluded that, in particular, the rapid prototyping possibility combined with the material's resulting mechanical strength, solvent resistance, and biocompatibility, as well as the inherently easy surface functionalization, are strong factors to make thiol−ene polymers strong contenders for promising future materials for many biological, clinical, and technical labon-a-chip applications.

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“…[19][20][21] It was also reported that nanostructured fabric networks exhibit oleophilicity, suggesting an interesting possibility to use the material for oil recovery and oil-water separation. 29,30 Superhydrophobicity has been commonly characterized by the high contact angle of a surface with a (usually millimetre-sized) water drop approaching 180 and the low substrate tilt angle for the onset of drop rolling. However, additional measures of the quality of superhydrophobicity have recently attracted attention.…”

Section: Introductionmentioning

confidence: 99%

Extreme water repellency of nanostructured low-surface-energy non-woven fabrics

et al. 2012

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We report the extreme water repellent nature of non-woven fabrics of PET (polyethyleneterephthalate) whose fiber surfaces are nanotextured with oxygen plasma and coated with a low-surface-energy nanofilm. The surface effectively suppresses vapor condensation and repels condensed water droplets in addition to exhibiting a high contact angle and a low contact angle hysteresis with a millimetre-sized water drop. We also show that the surface maintains its superhydrophobicity after water-vapor condensation and after oil-wetting due to high-aspect-ratio nanohairs on the fibers. The superior waterrepellent ability of the plasma treated non-woven fabric can be exploited in a variety of industrial applications including water harvesting and fuel cell water management even under oily contaminations.

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Water-in-oil emulsion separation within a milli-fluidic device

Cited by 8 publications

References 11 publications

Demulsification of Kerosene/Water Emulsion in the Transparent Asymmetric Plate-Type Micro-Channel

Demulsification of Kerosene/Water Emulsion in the Transparent Asymmetric Plate-Type Micro-Channel

Thiol–Ene Based Polymers as Versatile Materials for Microfluidic Devices for Life Sciences Applications

Extreme water repellency of nanostructured low-surface-energy non-woven fabrics

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