Research On Flexible Piezoresistive Sensor Based On Nanocomposites/Sponge

Wearable electronic gadget demand has recently surged,and both domestic and international scholars are growing increasingly interested in wearable technology.Because they can perceive a wide range of external inputs,flexible sensors,which are important to wearable electronics,have a wide range of applications in the domains of human-computer interaction and medical health assessment.Unfortunately,traditional sensors are expensive and unpleasant to wear due to their bulk and lack of flexibility.Nanotechnology has important research implications for improving sensor performance and wearability,and recent breakthroughs have shifted the manufacture of flexible sensors in a new direction.Flexible piezoresistive sensors based on nanotechnology are developed and researched in this thesis to address the enormous demand in the fields of medical health monitoring and human-computer interaction,with the goal of resolving the issue of sensor wide strain,quick response,and low limit detection:1.A flexible piezoresistive sensors was produced by incorporating black phosphorus-gold nanocomposites into the sponge skeleton.Thanks to the excellent elasticity and mechanical characteristics of the melamine and the electrical conductivity of the black phosphorus-gold nanocomposites,the flexible piezoresistive sensors have excellent performance parameters,including a wide strain range（0-90%）,a reasonable gauge factor GF（0.838/1.50）,fast response times（10 ms）and recover times（20 ms）,and good repeatability and linearity.2.A flexible piezoresistive sensor was designed and built using a titanium carbide-gold nanocomposite modified melamine sponge bonded to a paper-based carbon pulp forked finger electrode.The contact effect between the sponge and the carbon paste electrode allows the sensor to maintain exceptional performance,including high sensitivity(32.34 KPa^-1),quick response times（32 ms）and recover times（24 ms）,as well as low detection and good repeatability.3.Research on applications by using the prepared flexible piezoresistive sensors.The two flexible piezoresistive sensors developed in this thesis were used for health monitoring and human-computer interface applications.They can be used to track human movement（for example:finger,wrist,and knee flexion）as well as other minute human life activities（e.g.heartbeat,pulse）.The black phosphorus-gold flexible piezoresistive sensor was used to produce a wearable smart glove,including completing the structural design,hardware design and software design,and finally the successful and precise control of the manipulator.