摘要
Inspired by the freezing tolerance performances found in living creatures, an effect approach is presented to develop novelantifreezing polymeric organohydrogel actuators. Through construction of a bilayer hydrogel including a nonresponsivepolyacrylamide (PAAm) layer and a pH-responsive polyacrylic acid (PAA) layer in the presence of a mixed solvent of water andglycerol, organohydrogel actuators that could produce various shape deformations at subzero temperatures have been achieved,and the actuating speed could be tuned by adjusting the temperature and the ratio between glycerol and water. Moreover, aseries of application demonstrations including a weightlifting robot, artificial valve, and robotic arm have been displayed. Inaddition, by introducing the ionic compound KI into the glycerol-based organogel, flexible conductors that could perform stablesensing performance over a wide range of temperatures from -30℃ to 60℃ have been developed.
基金
This work was supported by the National Natural Science Foundation of China(51873223,51773215,and 21774138)
the National Key Research and Development Program of China(2018YFB1105100)
the Key Research Program of Frontier Science,Chinese Academy of Sciences(QYZDBSSW-SLH036)
the Natural Science Foundation of Ningbo(2018A610035)
the Youth Innovation Promotion Association of Chinese Academy of Sciences(2017337,2019297)
the Ningbo Science and Technology Bureau(2016C50009).
