Research / 2020 / Article / Fig 2

Research Article

3D Printed Ultrastretchable, Hyper-Antifreezing Conductive Hydrogel for Sensitive Motion and Electrophysiological Signal Monitoring

Figure 2

Mechanical and antifreezing properties of the proposed hydrogel. (a) Photographs demonstrating the stretchability of the hydrogel at normal temperature: (i) the proposed hydrogel, (ii) a stretched hydrogel for 20 times of its original length, (iii) the schematic of the microstructure of the proposed hydrogel, and (iv) the schematic of the microstructure of a stretched hydrogel. (b) Tunable tensile strain of the proposed hydrogels with different weight concentrations of nHAp. (c) Tortuosity of the proposed hydrogel at -115°C. (d) The effect of the temperature on the stretchability of the proposed hydrogel. (e) The effect of the temperature on the conductivity of the proposed hydrogel: a LED lamp test is inserted in the figure to show the comparison of the conductivity of the proposed hydrogel working at -115°C (left) and a previously reported one working at 0°C (right). (f) DSC measurement of the proposed hydrogel with different components.