Fig. 6
Stability and durability test of the PANI/TPU membrane sensor. a Relative changes in resistance of the PANI/TPU membrane sensor under different strains. b Stability test under a fixed strain of 30.7%. c A is the I-V curve at the initial stage, and B is the I-V curve after 100 times stretching to 30.7% and placed for 24 h. d A is the I-V curve at the initial stage, and B is the I-V curve after 1000 times bending and placed for 24 h