Flexible pressure sensors are widely used in health monitoring

robot sensing and shape recognition due to their good mechanical flexibility and wearability.In this study

five sensors are made using carbon black(CB)and multi-walled carbon nanotubes(MWCNTs)in different coating sequences on polydimethylsiloxane(PDMS)sponge as the skeleton.Then

the piezoresistive performance is studied

and it is found that the performance of the sensors with different composite sequences is significantly different.Among all the samples

the CB+MWCNTs@PDMS(where

CB is first wrapped on the PDMS sponge

followed by the wrappin

g of MWCNTs)sensor has the highest sensitivity

with a maximum sensitivity of 14.61kPa

-1

.At the same time

the sensor also has a fast response time of 320ms

an instantaneous recovery time of 230ms

a detection range of 0~70kPa and a stability of more than 2000 cycles.It can maintain stable performance at 10~50℃ and 40%~80%RH.The sensor is applied to end-effector

showing its great potential in industrial and agricultural fields.