Rapid Prototyping of Polymer-Based Rolled-Up Microfluidic Devices

Area of Science:

• Materials Science and Engineering
• Microfluidics and Lab-on-a-Chip Technology
• Heat Transfer and Fluid Dynamics

Background:

• Traditional microfluidic device fabrication is often time-consuming and expensive.
• There is a need for efficient and scalable methods to produce complex microchannel geometries.
• Enhanced heat and mass transfer are crucial for various microfluidic applications.

Purpose of the Study:

• To present a simple, rapid, and cost-effective fabrication method for polymer-based microfluidic prototypes.
• To demonstrate the functionality of three-dimensional (3D) spiral microchannels for heat transfer applications.
• To explore the potential of this novel fabrication approach for scalable manufacturing.

Main Methods:

• Fabrication of thin polymer films using a casting method.
• Plasma activation of polymer films to facilitate rolling.
• Rolling thin films around a center core to create 3D spiral microchannels.

Main Results:

• Successful fabrication of rolled-up microfluidic devices with single or dual fluidic networks.
• Demonstrated effective heat transfer in both heat sink and heat exchanger configurations without leakage.
• Observed generation of Dean vortices, enhancing heat/mass transfer and preventing fouling.

Conclusions:

• The rolled-up thin film technique offers a novel and efficient approach to microfluidic device fabrication.
• The resulting 3D spiral microchannels show significant potential for heat transfer, mixing, and sorting applications.
• This method represents a promising step towards roll-to-roll processing for mass production of microfluidic devices.