期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 41, 期 8, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201900543
关键词
hydrogel actuators; hydrogel capsules; intelligent materials; ionic strength; shape deformation
资金
- National Key Research and Development Program of China [2018YFB1105100]
- National Natural Science Foundation of China [51873223, 51773215, 21774138]
- Key Research Program of Frontier Science, Chinese Academy of Sciences [QYZDB-SSW-SLH036]
- Natural Science Foundation of Ningbo [2018A610035]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2017337, 2019297]
As one of the most promising intelligent materials, polymeric hydrogel actuators could produce reversible shape change upon external stimuli. Although complex shape deformation from 2D to 3D have been achieved, the realization of actuating behavior from 3D to 3D is still a significant challenge. Herein, an effective strategy to develop a novel bilayer hollow spherical hydrogel actuator is proposed. Through immersing a Ca2+ incorporated gelatin core into alginate solution, an ionic-strength-responsive alginate layer will be formed along the gelatin core via alginate-Ca2+ crosslinks, and then another thermo-responsive alginate-poly(2-(dimethylamino)ethyl methacrylate)(Alg-PDMAEMA) layer is introduced to achieve a bilayer hydrogel with ionic strength and temperature dual responsiveness. A hollow hydrogel capsule could be obtained if a spherical gelatin core is applied, and it could produce complex shape deformations from 3D to 3D upon the trigger of ionic strength and temperatures changes. The present work may offer new inspirations for the development of novel intelligent polymeric hydrogel actuators.
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