DocumentCode :
1863344
Title :
A thermally actuated microfluidic relay valve
Author :
Bazargan, V. ; Stoeber, B.
Author_Institution :
Dept. of Mech. Eng., Univ. of British Columbia, Vancouver, BC, Canada
fYear :
2009
fDate :
21-25 June 2009
Firstpage :
1289
Lastpage :
1292
Abstract :
This work demonstrates a new 2-stage valving concept for microfluidic systems based on polydimethylsiloxane (PDMS) that uses the reversible gelation of a thermally responsive polymer solution in a control channel to deflect a membrane into the main flow channel for flow control. This method can control flow through a system of PDMS channels using integrated electric heating elements and only one control pressure source, compared to the off-chip pressure manifold needed in existing systems. This valve technology therefore enables the formation of portable diagnostics tools for biomedical applications and environmental monitoring allowing on-site analysis. Valves with zero leakage rates and a response time of about 5 seconds have been achieved.
Keywords :
electric heating; microchannel flow; microvalves; polymer solutions; 2-stage valving concept; PDMS; biomedical applications; environmental monitoring; flow channel; flow control; integrated electric heating elements; leakage rates; microfiuidic systems; on-site analysis; polydimethylsiloxane; portable diagnostics tools; reversible gelation; thermally actuated microfluidic relay valve; thermally responsive polymer solution; Biomedical monitoring; Biomembranes; Control systems; Microfluidics; Polymer gels; Pressure control; Relays; Resistance heating; Temperature control; Valves; Hydrogel; Pluronic; microvalve; thermal actuation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4244-4190-7
Electronic_ISBN :
978-1-4244-4193-8
Type :
conf
DOI :
10.1109/SENSOR.2009.5285866
Filename :
5285866
Link To Document :
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