Research On Flexible Stretchabe Sensor

Among all kinds of sensors,patch-type strain gauges are one of the most important smart sensors,which are widely used in strain,acceleration and tensile force measurement and health monitoring.With the growing demand for smart and miniaturized electronic devices,flexible stretchable strain sensors have received widespread attention because of their good flexibility and elongation,and they are also wearable,lightweight,portable,and biological The advantages of good tolerance,economy,environmental protection,etc.have broad development prospects in personalized health monitoring,sports monitoring,human-computer interaction and so on.In this study,using carbon nanotubes as the conductive sensing material and silica gel as the flexible base layer,by preparing a self-assembled carbon nanotube thin film sensing layer and implanting a bionic cilia structured flexible sensor,the flexible sensor of this structure was explored for the outside world Stimulus response and sensor stability;use computer-controlled spraying method to parameterize and pattern the sensor layer;use plasma treatment process to process the carbon nanotube material in the process,and the preparation flexibility The sensor is compared with the sensor without plasma treatment.Experimental results show that:(1)The carbon nanotube sensing layer was prepared by the self-assembly process of the water/air interface,and the ciliary sensor supported by the cantilever responded obviously to the external force.(2)The complex sensing layer pattern of carbon nanotubes can be prepared by controllable spraying.Comparing different sensors,the response of resistance and resistance change rate over time indicates that the preparation method is reproducible.(3)The tensile sensitivity of the sensor is improved through the plasma treatment process.Although the initial resistance value(15 times)and the strain range of the sensing layer of the carbon nanotube after the spraying process were treated increased,the sensitivity factor GF increased from 3.9 to 11.5.