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Issue 4, 2019
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Latchable microfluidic valve arrays based on shape memory polymer actuators

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Abstract

We report arrays of latching microfluidic valves based on shape memory polymers (SMPs), and show their applications as reagent mixers and as peristaltic pumps. The valve design takes advantage of the SMP's multiple stable shapes and over a hundred-fold stiffness change with temperature to enable a) permanent zero-power latching in either open or closed positions (>15 h), as well as b) extended cyclic operation (>3000 cycles). The moving element in the valves consists of a tri-layer with a 50 μm thick central SMP layer, 25 μm thick patterned carbon-silicone (CB/PDMS) heaters underneath, and a 38 μm thick styrene ethylene butylene styrene (SEBS) impermeable film on top. Each valve of the array is individually addressable by synchronizing its integrated local Joule heating with a single external pressure supply. This architecture significantly reduces the device footprint and eliminates the need for multiplexing in microfluidic large scale integration (mLSI) systems.

Graphical abstract: Latchable microfluidic valve arrays based on shape memory polymer actuators

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Publication details

The article was received on 27 Sep 2018, accepted on 10 Dec 2018 and first published on 21 Jan 2019


Article type: Paper
DOI: 10.1039/C8LC01024B
Lab Chip, 2019,19, 608-617
  • Open access: Creative Commons BY-NC license
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    Latchable microfluidic valve arrays based on shape memory polymer actuators

    B. Aksoy, N. Besse, R. J. Boom, B. Hoogenberg, M. Blom and H. Shea, Lab Chip, 2019, 19, 608
    DOI: 10.1039/C8LC01024B

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