Research On High Performance Strain Sensors Based On Disconnection Mechanism

Flexible strain sensors consist of flexible materials are promising to be widely used in structural health,medical care,intelligent ware,artificial limbs and environment monitoring due to their good flexibility,expansibility,bendability and foldability.Complex targets might be expediently monitored as flexible sensors can be decorated and adjusted with ease to fit the working environment.However,the challenge of low sensitivity and limited working range is to be addressed first:high sensitivity requires dramatic change within limited deformation leading to significant electrical signal varication whereas wide working range demands structural integrity during deformation of device,thereby high sensitivity and wide working range are hardly to be implemented at the same time.In order to address the aforementioned challenge,fragmentized sponge and carbon nanotube/polydimethylsiloxane(CNT/PDMS)conductive composite are employed to fabricate high performance flexible strain sensor based on fragmentation-disconnection working mechanism.The following four fields are mainly covered in this study:(1)First of all,the challenge that high sensitivity and wide working range of flexible sensors are hardly to be implemented at the same time is clarified after systematically literature investigation.(2)Controlled by fragmentation-disconnection mechanism,fragmentized sponged based flexible strain sensor achieves gauge factor of?18.7 and working range of 80%,which precedes commercial metal-based strain gauge(?2,?2%).(3)Controlled by fragmentation-disconnection mechanism,fragmentized CNT/PDMS composite based flexible strain sensor achieves gauge factor up to 1362.8 and working range up to 80%.(4)On the basis of previous work,flexible sensors that based on fragmentized sponge is employed to explore potential application in physical monitoring and so on.