Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster Session II

CPP 32.5: Poster

Dienstag, 13. März 2018, 14:00–16:00, Poster B

Modified Network Description Model of a Hydrogel-based Microvalve with Static and Transient Material Behavior for Parameter Variation Studies — •Philipp J. Mehner, Anthony Beck, Dai Zhongke, Andreas Voigt, Uwe Marschner, and Andreas Richter — Chair of Microsystems, Technische Universität Dresden, Germany

A hydrogel-based microvalve is a device which can be used for flow control in microfluidic systems either by an external source like heat or by fluidic stimuli like concentration levels or ph value. These microvalves show a transistor-like behavior and, comparable to the microelectronics field, open the possibility for highly integrated chips. This creates the need for a design environment to model the fluid behavior of microfluidic chips and requires furthermore a description of the behavior of the hydrogel in the valve as well as its interaction with the trigger domain.

We propose an updated network description model which is capable of efficiently computing an arbitrary number of hydrogel-based microvalves. The benefit is, that trigger interactions and swelling rates are included within the model and flow results can be probed for every individual microvalve. Hydrogel material behavior is implemented for the transient as well as the quasistatic swelling regime. Efficient parameter studies are now feasible and demonstrated. With this tool, it is possible to model highly integrated microfluidic circuits, such that design ideas can be tested first and can then be verified experimentally.