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DL11: Microflow Control using Thermally Responsive Triblock Copolymers

Project ID DL11
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Start Date Fri 2003-Feb-07 15:39:27
Last Updated Tue 2005-Feb-01 15:01:04
Abstract Dilute aqueous solutions of poly(ethylene oxide)x-poly(propylene oxide)y-poly(ethylene oxide)x triblock copolymers undergo reversible gel formation at elevated temperatures. This effect can be effectively used for active and passive flow control in microfluidic devices, where the gel phase can block the flow channel partially or entirely. Heat transfer occurs fast through the typically small width of a microchannel resulting in a fast valve response time. A novel micromixing concept has been developed based on active microvalves.
Status Completed
Funding Source Industry
IAB Research Area BIOMEMS AND MICROFLUIDICS
Researcher(s) Boris Stoeber
Advisor(s) Dorian Liepmann, Susan Muller
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