期刊
ADVANCED MATERIALS
卷 31, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201900042
关键词
3D geometric structures; actuators; ambient temperature processing; covalent-noncovalent interpenetrating networks; self-healing
类别
资金
- National Natural Science Foundation of China [51873123, 51673121, 51603132, 51473104]
- Outstanding Young Scholars Fund of Sichuan University [2016SCU04A16]
Soft materials that can reversibly transform shape in response to moisture have applications in diverse areas such as soft robotics and biomedicine. However, the design of a structurally transformable or mechanically self-healing version of such a humidity-responsive material, which can arbitrarily change shape and reconfigure its 3D structures remains challenging, Here, by drawing inspiration from a covalent-noncovalent network, an elaborately designed biopolyester is developed that features a simple hygroscopic actuation mechanism, straightforward manufacturability at low ambient temperature (<= 35 degrees C), fast and stable response, robust mechanical properties, and excellent self-healing ability. Diverse functions derived from various 3D shapes that can grasp, swing, close-open, lift, or transport an object are further demonstrated. This strategy of easy-to-process 3D structured self-healing actuators is expected to combine with other actuation mechanisms to extend new possibilities in diverse practical applications.
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