| Highly sensitive pressure sensors have been a popular trend of medical products in recent years.Among various pressure sensors,piezoresistive sensors have been widely studied due to their high detection sensitivity.Graphene and carbon nanotubes are favored by material researchers because of their unique properties,such as high strength,good toughness,light weight,good electrical and thermal conductivity,as well as special piezoresistive properties wtih a good application prospect,and they can be combined with other materials to obtain composites with excellent performance.In this paper,a series of graphene/carbon nanotubes composites were prepared by using the piezoresistive properties of carbon nanoparticles and graphene and combining the templates made of sodium alginate and polydimethylsilane.This material has a complex surface structure and internal structure,which not only makes it have a large specific surface area,but also increases the detection range of pressure.Together with the extraordinary piezoresistive effect of the material itself,it has a great advantage in pressure sensors.The surface morphology and internal structure of graphene/carbon nanotubes were observed and characterized by various analytical methods,and its performance was studied b.A pressure detection device by connecting the graphene/carbon nanotubes to the electrochemical work station was used to detect the current changes caused by the external pressure.The change of resistance under the condition of increasing pressure with time,and the relationship between stability and pressure and time response were detected respectively.The graphene/carbon nanotube composites were analyzed and summarized,and it was found that the prepared sensors had good current response,which indicated that the pressure sensors were very sensitive.In addition,the designed sensor has a complex internal channel structure,which can expand the detection range and has greater application potential in practical applications. |
PDF Full Text Request