cm8b00008_si_006.avi (1.18 MB)
Multifunctional Stimuli-Responsive Hydrogels with Self-Healing, High Conductivity, and Rapid Recovery through Host–Guest Interactions
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posted on 2018-02-10, 00:00 authored by Zexing Deng, Yi Guo, Xin Zhao, Peter X. Ma, Baolin GuoSelf-healing
hydrogels with multifunctionality as a type of fascinating
material show potential application in various fields, such as biomedicine,
tissue engineering, and wearable electronic devices. However, to combine
the properties of autonomous self-healing property, high conductivity,
excellent mechanical properties, and stimuli-responsive properties
for hydrogel is still a great challenge. Herein, we present self-healing
conductive hydrogels based on β-cyclodextrin (β-CD), N-isopropylacrylamide (NIPAM), multiwalled carbon nanotubes
(CNT) and nanostructured polypyrrole (PPY). Among them, β-CD
served as the host molecule, and NIPAM served as the guest molecule,
CNT as the physical cross-linker and conducting substrate, and PPY
as the highly conductive component, respectively. The obtained hydrogels
exhibit high conductivity, self-healing property, flexible and elastic
mechanical property and rapid stimuli-responsive property both to
temperature and near-infrared (NIR)-light together. The excellent
characteristics of the hydrogels are further illustrated by pressure-dependent
sensors, large-scale human motion monitoring sensors and self-healable
electronic circuit. Cytotoxicity test indicated that they are nontoxic
to L929 fibroblast cells and C2C12 myoblast cells. Taken together,
these multifunctional hydrogels are excellent candidates for stimuli
responsive electrical devices, artificial organs, and so on.