Experimental study on a small flux, high pressure peristaltic micropump

In this paper, we improved the design of a membrane peristaltic micropump. The pump was driven by a rotating motor with magnetically attracted steel balls on top. The size of the micropump was significantly reduced to realize small flow rate and high pressure, to serve for precision delivering applications. Testing results showed that the pump can realize small flow rate from 0.93 to 12.73 mu L/min, with very high linearity. The back pressure could reach more than 83 kPa until the PDMS (polydimethylsiloxane) channel structure was destroyed under high pressure. The pulsation problem of the peristaltic pump was also mentioned, as well as the possible solution to deliver a certain amount of small sample volume.