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Fabrication of the Thermoplastic Microfluidic Channels

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Published on: February 3, 2008

Enhanced Imbibition in Liquid-Infused Coated Microchannels.

Andreu Benavent-Claró^1,2, Sergi Granados Leyva^1,3, Ignacio Pagonabarraga^1,3

¹Departament de Física de la Matèria Condensada, Universitat de Barcelona, Barcelona 08028, Spain.

Langmuir : the ACS Journal of Surfaces and Colloids

|December 6, 2024

Summary

Infusing channel walls with liquid lubricants significantly speeds up spontaneous capillary imbibition, reducing viscous friction and improving micro/nanodevice performance. This lubrication method can cut imbibition times by up to 50%.

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Area of Science:

Physics
Fluid Dynamics
Materials Science

Background:

Spontaneous capillary imbibition is crucial for micro and nanodevices, offering passive fluid transport.
High viscous friction from channel walls limits the speed and efficiency of imbibition.

Purpose of the Study:

To experimentally investigate the effect of liquid lubricants on spontaneous capillary imbibition speed.
To reduce viscous friction and enhance fluid flow in micro/nanoscale channels.

Main Methods:

Experimental demonstration of infusing channel walls with liquid lubricants.
Systematic variation of lubricant viscosity.
Measurement of imbibition time and viscous friction reduction.

Main Results:

Infusing channel walls with lubricants substantially accelerates the imbibition process.
Viscous friction is significantly reduced by the liquid lubricant.
Imbibition time was reduced by up to 50% with optimized lubricant viscosity.

Conclusions:

Liquid lubrication is an effective strategy to overcome viscous friction in spontaneous capillary imbibition.
This approach offers a pathway to enhanced performance of micro and nanodevices relying on passive fluid transport.
Experimental findings align with theoretical predictions, validating the lubrication framework.