Preparation of GNP/CNTs/PDMS Flexible Strain Sensor by Scraping and Coating Method
Aiming at the problems of poor stability and low sensitivity of flexible strain sensors,the research group used graphene(GR)and carbon nanotubes(CNTs)as conductive layers and polydimethylsiloxane(PDMS)as the substrate.A sandwich type flexible strain sensor was prepared by scraping and coating method.During the research process,the mechanical properties,sensitivity and stability of the flexible strain sensor were tested by tensile testing machine under the condition that the mass fraction of conductive material was 4％and the mass ratio of graphene to carbon nanotubes was 3∶2.The results show that the sensor has a good linear relationship in the strain range of 0～20％,and the stress-strain linear correlation coefficient is 0.997 03.In the strain range of 0～20％,the sensitivity remains unchanged with the increase of strain.In addition,after 200 times ofstretching and shrinking experiments,the sensor still maintains good stability.
flexible strain sensorGR(Graphene)CNTs(Carbon Nanotubes)scraping and coating methodsensitivity
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