Pneumatically-Driven Micropump Using Active Check-Valve for Liquid Transportation
In this paper, we designed a micro-pump using active check-valve for sample transportation. The micro-pump is designed as a moving structure using Polydimethylsiloxane (PDMS) membrane with an active valve deformed pneumatically to generate a transporting of the sample streams to the detected region. Theoretical analyses and numerical simulations were employed to determine the deformation mechanism. Hence, the numerical calculations were also used to design the optimum actuated membrane. Variations of the generated flow rate with the pneumatic frequencies, air pressures and operated cases were analyzed. The larger flow rates are obtained for the basic parameters such as driving frequencies and actuated air pressures depending on location of active check-valve. Additionally, three different design features are employed to alternately induce the flow field and to generate an effectively transporting performance. The operation of the case III can be achieved more efficient flow rate than the one of the single-side one. The development of micro-pump is a crucial component in many microfluidic applications.
KeywordsMicrofluidics Micro-pump Active check-valve Moving structure
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