Fabrication and characterization of two-chamber and three-chamber peristaltic micropumps |
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Authors: | Shun-Fa Hwang and Yu-Shiuan Shiu |
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Affiliation: | (1) Department of Electrical Engineering and Center for Micro/Nano Science and Technology, National Cheng Kung University, 1 University Road, Tainan, 701, Taiwan;(2) Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, Taiwan |
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Abstract: | Two-chamber and three-chamber peristaltic micropumps with straight channels or tapered channels are fabricated by UV photolithography.
Piezoelectric buzzers are chosen as actuation elements because they are cheap and have high actuation amplitude. A negative
photoresistive material, SU8-25, is used as a structure material, and PDMS is chosen to bond different parts of the micropump.
The effects of working phases and channel geometries are investigated and the performance of two-chamber and three-chamber
micropumps is compared. The results indicate that three-chamber micropumps have better flow rates than two-chamber counterparts.
For three-chamber micropumps, four-working phases have the best flow rate, six-working phased are the second, and three-working
phases are the last. The channel length may have no clear effect on the flow rate, while the channel width and the angle of
nozzle/diffuser have evident effects on the flow rates. |
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Keywords: | |
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