Triboelectric Nanogenerators Based On Human Compatible Materials For Intelligent Sensing And Energy Collection

Sensors are an indispensable technological product in modern civilized life.Especially in the era of Internet of Things and artificial intelligence,the big data created by sensors has greatly improved people’s living standards.In recent years,the development of sensors has become miniaturized,intelligent and flexible,and the energy supply module has become one of the main factors restricting the development of sensors.Triboelectric nanogenerator is a new type of energy conversion device,and its theoretical source is Maxwell displacement current Self-powered sensor based on Maxwell displacement current has broad application prospect and important application value in the fields of implanting medical devices,humaan-computer interaction and intelligent home.Understand the triboelectric power must first understand how triboelectric charge,will need to begin from two objects collide with each other,the surface of objects collide with each other after triboelectric electric charge,and can generate electromagnetic fields at the same time On this basis,we studied the triboelectric power of the most basic contact separation model of three types of collision:elastic collision,inelastic collision and ideal inelastic collision.Measuring the interactions between spheres when they collide can give us a detailed understanding of how basic collisions generate electromagnetic fields.These measurements can be made using different sphere collision experiments,including changes in the displacement of two spheres in the same reference frame,the displacement of one sphere after the collision,or the position changes before and after the collision of both spheres.Experiments with different variables provide more electromagnetic field variations and associated increases in boundary collisions.However,there are significant research difficulties in the experiments of spherical collision systems,which usually require precise control of experimental accuracy with subtle variables.Here,we design a collision experimental process based on the contact separation of triboelectric,and the experimental results show that electromagnetic fields are generated in all three types of collision processes as predicted Then a simple power generation system,positioning system and path tracking system are designed.For the description of the energy of space electromagnetic field,we can use the relativistic time-space view Maxwell’s equations under the inertial system,but for the more complex case where there is always external work,the energy in the system is not conserved.At this time,most of the problems can be solved by using Galileo’s Maxwell’s equations under the condition of low speed approximation.Its potential applications in physics and new energy are also discussed.After understanding the mechanism of the collision mode of the friction nanogenerator,a feather based single-electrode mode nanogenerator was designed.A feather based single-electrode mode nanogenerator is designed,which has a simple manufacturing method and still has some characteristics of feathers,such as light weight and self-healing,without special design and machining.The voltage and short-circuit current are 90 V and 3.5 μA,respectively.Its maximum output power is 0.12 mW/g.In addition,the output voltage varies linearly with humidity to perceive water in the environment,with a coefficient of 0.968.Based on the individual physical structure of the feather,the single-electrode triboelectric nanogenerator of the feather can heal itself after being destroyed,and its output performance hardly decreases before and after self-healing.With excellent damage resistance.When the feather single-electrode triboelectric nanogenerator is applied to the organism itself,it still has excellent output performance and sensing characteristics,which expands the application range of the triboelectric nanogenerator on the microorganism.Finally,a windmill based on a feather single-electrode triboelectric nanogenerator was assembled,which effectively converts wind energy into electricity with a power density of 0.62 mW/g.After the development of self-healing feather friction nano-generator,we try to develop a kind of friction nano-generator sensor which can be worn directly and can take into account the intelligent sensing.A triboelectric eye mask based on Maxwell displacement current is proposed for body energy collection and eye movement monitoring.The triboelectric eye mask consists of a three-dimensional(3D)eye mask with grooves,polytetrafluoroethylene(PTFE)rubbed with nylon fabric,and a homemade eye mask with a sandwich.The triboelectric eye mask is designed to be electrically charged by contact Compared with the triboelectric eye mask before charging,the surface voltage of the triboelectric eye mask after charging can be greatly increased from about 0.21 kV to about 3.36 kV.When the vertical distance between the triboelectric layer and the collector is 5 mm,the open-circuit voltage is 358 V.In addition,the designed triboelectric eye mask can still have good performance after cleaning with commercial detergent The surface potential of PTFE etched by argon ion after washing is about 330 V.The triboelectric eye mask can not only harvest the energy of human movement and realize self-power,but also monitor the eye movement of wearable medical devices during sleep.Therefore,the triboelectric eye mask is robust and has great development prospects in the field of medical care equipment.