Low cost fabrication and assembly process for re-usable 3D polydimethylsiloxane (PDMS) microfluidic networks

Area of Science:

• Materials Science
• Microfluidics Engineering
• Biotechnology

Background:

• Microfluidic devices are crucial for various scientific applications but often require complex fabrication processes.
• Existing methods for polydimethylsiloxane (PDMS) device assembly can be costly and time-consuming, requiring specialized facilities.

Purpose of the Study:

• To develop an accessible and cost-effective method for manufacturing and assembling PDMS-based microfluidic devices.
• To enable the creation of multi-layer PDMS structures with controlled layer thickness and flat surfaces.
• To facilitate easy cleaning, disassembly, and reusability of microfluidic components.

Main Methods:

• Utilized low-cost, reusable laser-cut polymethyl methacrylate (PMMA) parts for device construction.
• Employed mechanical clamping for sealing PDMS layers, allowing for facile disassembly and layer management.
• Focused on achieving controlled PDMS layer thickness and ensuring flat layer surfaces for multi-layer assembly.

Main Results:

• Successfully demonstrated a method for easily manufacturing and assembling PDMS microfluidic devices.
• Achieved controlled thickness and flat surfaces of PDMS layers, enabling the construction of multi-layer devices.
• The mechanical clamping method allows for straightforward cleaning and reuse of device components.

Conclusions:

• The described fabrication method is cost-effective, requires no specialized cleanroom facilities, and is suitable for educational and research settings.
• The technique simplifies the assembly and maintenance of PDMS microfluidic devices, promoting wider adoption.
• This approach offers flexibility for reusing or replacing individual layers, enhancing the practicality of microfluidic device development.