A hydrogel-actuated smart microvalve with a porous diffusion barrier back-plate for active flow control

Antonio Baldi, Yuandong Gu, Paul E. Loftness, Ronald A Siegel, Babak Ziaie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Scopus citations

Abstract

This paper reports on the fabrication and testing of a hydrogel-actuated microvalve that responds to changes in the concentration of specific chemical species in an external liquid environment. It consists of a hydrogel disc sandwiched between a porous plate and a flexible silicone rubber membrane. Swelling of the hydrogel produced by diffusion of chemical species through the porous plate results in the deflection of the membrane and closure of the valve intake orifice. A phenylboronic acid based hydrogel was used to construct a smart microvalve that opens and closes in response to the changes in the glucose concentration and pH. The fastest response time achieved was 16 minutes using a 70 μm thick hydrogel and a 60 μm porous back plate.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Micro Electro Mechanical Systems (MEMS)
Pages105-108
Number of pages4
StatePublished - Jan 1 2002
Event15th IEEE International Conference on Micro Electro Mechanical Systems MEMS 2002 - Las Vegas, NV, United States
Duration: Jan 20 2002Jan 24 2002

Other

Other15th IEEE International Conference on Micro Electro Mechanical Systems MEMS 2002
CountryUnited States
CityLas Vegas, NV
Period1/20/021/24/02

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