Functionalizing
Double-Network Hydrogels for Applications in Remote Actuation and
in Low-Temperature Strain Sensing
Posted on 2020-06-25 - 11:40
Multifunctional
hydrogels have important applications in various fields such as artificial
muscles, wearable devices, soft robotics, and tissue engineering,
especially for those with favorable mechanical properties, good low-temperature
resistance, and stimuli-responsive capabilities. In the current study,
a type of polyacrylamide/sodium alginate/carbon nanotube (PAAm/SA/CNT)
double-network (DN) hydrogel was fabricated, which exhibited a high
tensile strength of 271.68 ± 6.04 kPa, a favorable conductivity
of 1.38 ± 0.17 S·m–1, and a good self-healing
ability under heating conditions. In addition, the composite hydrogel
exhibited controllable photomechanical deformations under near-infrared
irradiation, such as bending, swelling, swimming, and object grasping.
To further broaden the applications of the hydrogel in low-temperature
environments, calcium chloride (CaCl2) was introduced into
such a PAAm/SA/CNT DN hydrogel as an additive. Interestingly, the
tensile/compressive strengths as well as elasticity were well-maintained
at a temperature as low as −20 °C. In addition, the PAAm/SA/CNT/CaCl2 hydrogel presented excellent conductivity, recoverability,
and strain-sensing capability under such extreme conditions. Overall,
the investigations conducted in this paper have provided potentially
new methods and inspirations for the generation of multifunctional
PAAm/SA/CNT/CaCl2 hybrid DN hydrogels toward extended applications.
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Zhang, Jin; Zeng, Liangdan; Qiao, Ziwen; Wang, Jun; Jiang, Xiancai; Zhang, Yu Shrike; et al. (2020). Functionalizing
Double-Network Hydrogels for Applications in Remote Actuation and
in Low-Temperature Strain Sensing. ACS Publications. Collection. https://doi.org/10.1021/acsami.0c10430
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AUTHORS (7)
JZ
Jin Zhang
LZ
Liangdan Zeng
ZQ
Ziwen Qiao
JW
Jun Wang
XJ
Xiancai Jiang
YZ
Yu Shrike Zhang
HY
Huanghao Yang
KEYWORDS
Multifunctional hydrogelstissue engineeringcalcium chlorideapplicationwearable devicesstrain-sensing capabilityFunctionalizing Double-Network HydrogelsPAAmnear-infrared irradiationCaCl 2stimuli-responsive capabilitiesRemote ActuationLow-Temperature Strainphotomechanical deformationsDN hydrogelsself-healing abilityheating conditions