Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201704568
Keywords
anisotropic structures; color-changing materials; macroscopic supramolecular assembly; polymeric hydrogel actuators; shape deformation
Categories
Funding
- National Natural Science Foundation of China [51773215, 21644009, 21774138]
- Natural science foundation of Zhejiang [LY17B040003, LY17B040004]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SLH036]
- China Postdoctoral Science Foundation [2016M590556, 2017T100438]
- Natural Science Foundation of Ningbo [2017A610043, 2017A610050]
- Ningbo Science and Technology Bureau [2016C50009]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2016268, 2017337]
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An effective approach to develop a novel macroscopic anisotropic bilayer hydrogel actuator with on-off switchable fluorescent color-changing function is reported. Through combining a collapsed thermoresponsive graphene oxide-poly(N-isopropylacrylamide) (GO-PNIPAM) hydrogel layer with a pH-responsive perylene bisimide-functionalized hyperbranched polyethylenimine (PBI-HPEI) hydrogel layer via macroscopic supramolecular assembly, a bilayer hydrogel is obtained that can be tailored and reswells to form a 3D hydrogel actuator. The actuator can undergo complex shape deformation caused by the PNIPAM outside layer, then the PBI-HPEI hydrogel inside layer can be unfolded to trigger the on-off switch of the pH-responsive fluorescence under the green light irradiation. This work will inspire the design and fabrication of novel biomimetic smart materials with synergistic functions.
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