期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 12, 页码 4925-4931出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202000181
关键词
Diels-Alder dynamic networks; light-driven soft robots; liquid crystals; room temperature programming; solution reprocessability
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- le Fonds de recherche du Quebec: Nature et technologies (FRQNT)
- FRQNT
Novel main-chain liquid crystalline Diels-Alder dynamic networks (LCDANs) were prepared that exhibit unprecedented ease for actuator programming and reprocessing compared to existing liquid crystalline network (LCN) systems. Following cooling from 125 degrees C, LCDANs are deformed with aligned mesogens self-locked at room temperature by slowly formed Diels-Alder (DA) bonds, which allows for the formation of solid 3D actuators capable of reversible shape change, and strip walker and wheel-capable light-driven locomotion upon either thermally or optically induced order-disorder phase transition. Any actuator can readily be erased at 125 degrees C and reprogrammed into a new one under ambient conditions. Moreover, LCDANs can be processed directly from melt (for example, fiber drawing) and from solution (for example, casting tubular actuators), which cannot be achieved with LCNs using exchangeable covalent bonds. The combined attributes of LCDANs offer significant progress toward developing easily programmable/processable LCN actuators.
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