【[Adv. Funct. Mater.]】Hydrogel Actuator with On-Off Switchable and Color-Tunable Fluorescence Behaviors
writer：Chunxin Ma, Wei Lu, X. Yang, J. He, X. Le, L. Wang, Jiawei Zhang,* M. J.Serpe, Y. Huang, Tao Chen*
keywords：Hydrogel Actuator
source：期刊
specific source：Adv. Funct. Mater,2018, in press
Issue time：2018年
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 thermo-responsive 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, we
obtained a bilayer hydrogel that can be tailored and reswell to form a three
dimensional (3D)
hydrogel actuator. The actuator could undergo complex shape deformation caused
by the
PNIPAM outside layer, then the PBI-HPEI hydrogel inside layer could 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.