4.6 Article

3D solvent-responsive actuator capable of directionally outputting thrust

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CELL REPORTS PHYSICAL SCIENCE
卷 3, 期 12, 页码 -

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CELL PRESS
DOI: 10.1016/j.xcrp.2022.101183

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资金

  1. Fundamental Research Funds for the Central Univer- sities, Heilongjiang Provincial Natural Science Foundation of China
  2. [YQ2020E009]

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Researchers have designed a carbon nanotube network with gradient stiffness, allowing for rapid deformation and directional thrust output through solvent stimuli.
The realization of actuators that can output thrust is critical for improving the comprehensiveness of actuator functions and broad-ening the range of soft robot applications. Thrust actuation can be achieved by the volume expansion of active materials under the stimulus, but most expandable materials suffer from the low rate of volume change and/or uncontrollable expansion directions. Here, we design a 3D network of carbon nanotubes with gradient stiffness. By synergistically utilizing the different responses of each stiffness layer to solvent stimuli, a solvent-responsive actuator that can deform rapidly and output thrust directionally is prepared. By adjusting the parameters of the actuator, it can achieve a variety of complex actuations such as multidirectional actuation, multifunc-tional actuation, sequential actuation, and programmable actuation.

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