A NOVEL MINIPUMP ACTUATED BY MAGNETIC PISTON
Radu Herşanu – Radu Olaru
This paper presents a novel and simple structure of a magnetically actuated mini/micro-pump for use in microfluidics. The pump of reciprocating type uses an externally actuated magnetic piston to develop pumping pressure. The piston, which slides inside a small main channel, is formed by a permanent magnet and two ferrofluid rings placed at the ends, ensuring both sealing and lubrication. The reciprocating movement of the piston is achieved using an oscillating magnetic field generated by an externally placed coil. The maximum backpressure attained when pumping atmospheric air was 21.6 mbar.
Keywords: ferrofluid, magnetic piston, micropump, passive valves