基于多壁碳纳米管与液态金属协同作用的压力传感器制备与性能研究OA

Compared with traditional sensors,flexible sensors have been widely concerned because of their low quality,flexibility and wearability.In order to improve the sensitivity of resistive sensor under small pressure stimulation,a liquid metal resistive pressure sen-sor with porous structure is designed.The sensor uses polydimethylsiloxane(PDMS)as flexible material,liquid metal(LM)and multi-walled carbon nanotubes(MWCNTs)as conductive fillers.The porous elastic structure is prepared by mixing these three elements through sugar template method.The resistance pressure sensor LM/MWCNTs/PDMS prepared on this basis is tested,and the sensitivity reaches 682.6 Pa-1,the loading response time is 130 ms,and the unloading response time is 135 ms under the small pressure stimula-tion of 0～1 kPa,and it has good stability.At the same time,the prepared resistive pressure sensor realizes the detection of human wrist joint and respiration,which shows its application potential in the field of health monitoring.