Peristaltic micropump using polyvinyl chloride gels with micropatterned surface

Area of Science:

• Materials Science
• Microfluidics
• Polymer Science

Background:

• Polyvinyl chloride (PVC) gels are compliant materials suitable for micropump fabrication due to their large deformation capabilities at high voltages.
• Existing smart material pumps often have limitations in performance or complexity.

Purpose of the Study:

• To design and fabricate a novel micropump utilizing polyvinyl chloride (PVC) gel.
• To investigate the effect of surface patterns on the performance of PVC gel pumps.
• To characterize the flow rate and efficiency of the developed PVC gel micropump.

Main Methods:

• Fabrication of a micropump by sandwiching a surface-patterned PVC gel sheet between multiple electrode sets.
• Sequential application of voltages to induce peristaltic deformation for unidirectional liquid flow.
• Characterization of pump performance, including flow rate, at various applied voltages and frequencies.

Main Results:

• A micropump with dimensions 35 mm × 25 mm × 4 mm was successfully fabricated.
• The pump utilizing a 174-μm-high pyramid-patterned PVC gel sheet achieved a flow rate of 224.1 µL/min at 800 V and 3 Hz.
• The performance of the PVC gel pump is comparable to or exceeds existing smart material-based pumps.

Conclusions:

• PVC gel is a viable material for constructing efficient and simple micropumps.
• Surface patterning significantly enhances the performance of PVC gel pumps.
• The developed PVC gel micropump offers a promising alternative for microfluidic applications.