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Liquid-Crystalline Soft Actuators with Switchable Thermal Reprogrammability
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DOI：10.1002/anie.201915694.png)
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摘要
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Thermal reprogrammability is essential for new-generation large dry soft actuators, but the realization sacrifices the favored actuation performance. The contradiction between thermal reprogrammability and stability hampers efforts to design high-performance soft actuators to be robust and thermally adaptable. Now, a strategy has been developed that relies on repeatedly switching on/off thermal reprogrammability in liquid-crystalline elastomer (LCE) actuators to resolve this problem. By post-synthesis swelling, a latent siloxane exchange reaction can be induced in the common siloxane LCEs (switching on), enabling reprogramming into on-demand 3D-shaped actuators; by switching off the dynamic network by heating, actuation stability is guaranteed even at high temperature (180 degrees C). Using partially black-ink-patterned LCEs, selectively switching off reprogrammability allows integration of completely different actuation modes in one monolithic actuator for more delicate and elaborate tasks.
Keyword:
dynamic siloxane exchange
elastomers
liquid crystals
soft actuators
switchable thermal reprogrammability
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16.9
论文数:
5.7W
被引数:
53.0W
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