期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 49, 页码 59381-59391出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c20348
关键词
light-responsive actuators; direct ink writing; photonic actuators; liquid crystal elastomer; bilayer actuators; soft robotics
资金
- Dutch Research Council (NWO)
- Dutch Ministry of Economic Affairs and Climate Policy
- Science and Engineering Research Board, India [CRG/2018/002365]
- IIT Madras by Ministry of Education, Government of India
- Prime Minister's Research Fellowship at IIT Madras
This study demonstrates the production of patterned actuators using direct ink writing, achieving multifunctionality and multiple shape changes between single- and bilayer films. Partially covered films and the application of liquid crystal inks provide space for creating novel actuators with enhanced capabilities.
Soft actuators allowing multifunctional, multishape deformations based on single polymer films or bilayers remain challenging to produce. In this contribution, direct ink writing is used for generating patterned actuators, which are in between single- and bilayer films, with multifunctionality and a plurality of possible shape changes in a single object. The key is to use the controlled deposition of a light-responsive liquid crystal ink with direct ink writing to partially cover a foil at strategic locations. We found patterned films with 40% coverage of the passive substrate by an active material outperformed standard fully covered bilayers. By patterning the film as two stripes, a range of motions, including left- and right-handed twisting and bending in orthogonal directions, could be controllably induced in the same actuator. The partial coverage also left space for applying liquid crystal inks with other functionalities, exemplified by fabricating a light-responsive green reflective actuator whose reflection can be switched on and off'. The results presented here serve as a toolbox for the design and fabrication of patterned actuators with dramatically expanded shape deformation and functionality capabilities.
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