Stretchable pumps for soft machines

Machines made of soft materials bridge life sciences and engineering. Advances in soft materials have led to skin-like sensors and muscle-like actuators for soft robots and wearable devices. Flexible or stretchable counterparts of most key mechatronic components have been developed, principally using fluidically driven systems6–8; other reported mechanisms include electrostatic, stimuli-responsive gels and thermally responsive materials such as liquid metals and shape-memory polymers. Despite the widespread use of fluidic actuation, there have been few soft counterparts of pumps or compressors, limiting the portability and autonomy of soft machines. Here we describe a class of soft-matter bidirectional pumps based on charge-injection electrohydrodynamics. These solid-state pumps are flexible, stretchable, modular, scalable, quiet and rapid. By integrating the pump into a glove, we demonstrate wearable active thermal management. Embedding the pump in an inflatable structure produces a self-contained fluidic ‘muscle’. The stretchable pumps have potential uses in wearable laboratory-on-a-chip and microfluidic sensors, thermally active clothing and autonomous soft robots.


Published in:
Nature, 572, 516–519
Year:
Aug 22 2019
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https://rdcu.be/bOSJJ
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Note: The file is under embargo until: 2020-02-16


 Record created 2019-08-20, last modified 2019-10-20

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