writer：Yukun Jian, BY Wu, XX Le, Y Liang, YC Zhang, DC Zhang, L Zhang, W Lu, JW Zhang*, Tao Chen*
keywords：Antifreezing and Stretchable Organohydrogels
source：期刊
specific source：Research, 2019, 2384347
Issue time：2019年

Inspired by the freezing tolerance performances found in living creatures, an e?ect approach is presented to develop novel antifreezing polymeric organohydrogel actuators. Through construction of a bilayer hydrogel including a nonresponsive polyacrylamide (PAAm) layer and a pH-responsive polyacrylic acid (PAA) layer in the presence of a mixed solvent of water and glycerol, 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, a series of application demonstrations including a weightlifting robot, arti?cial valve, and robotic arm have been displayed. In addition, by introducing the ionic compound KI into the glycerol-based organogel, ?exible conductors that could perform stable sensing performance over a wide range of temperatures from -30°C to 60°C have been developed.