期刊
ADVANCED SCIENCE
卷 9, 期 29, 页码 -出版社
WILEY
DOI: 10.1002/advs.202204003
关键词
covalent adaptable networks; liquid crystalline elastomers; soft robotics; stimuli-responsive polymers
资金
- National Science Foundation [DMR 1809841, DMR 2105369]
- DOE Office of Science [DE-SC0012704]
- University of Colorado Boulder Libraries Open Access Fund
Liquid crystalline elastomers (LCEs) are materials capable of undergoing large deformations, and their thermomechanical response is due to the coupling of polymer network properties and disruption of order between liquid crystalline mesogens. LCEs prepared via thiol-Michael addition reaction can be programmed and reprogrammed with complex director profiles under surface-enforced alignment, achieving distinctive shape transformations.
Liquid crystalline elastomers (LCEs) are stimuli-responsive materials capable of undergoing large deformations. The thermomechanical response of LCEs is attributable to the coupling of polymer network properties and disruption of order between liquid crystalline mesogens. Complex deformations have been realized in LCEs by either programming the nematic director via surface-enforced alignment or localized mechanical deformation in materials incorporating dynamic covalent chemistries. Here, the preparation of LCEs via thiol-Michael addition reaction is reported that are amenable to surface-enforced alignment. Afforded by the thiol-Michael addition reaction, dynamic covalent bonds are uniquely incorporated in chemistries subject to surface-enforce alignment. Accordingly, LCEs prepared with complex director profiles are able to be programmed and reprogrammed by (re)activating the dynamic covalent chemistry to realize distinctive shape transformations.
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