Triboelectric Nanogenerators Based On Waste Plastic Bags And Their Integrated Systems And Sensing Applications

Nano-generator(NG)is a new type of energy collector.As an emerging energy conversion technology in recent years,it has become a research hotspot.It is widely used in mechanical energy acquisition and electric energy conversion in the environment through the principle of triboelectric electrification and electrostatic induction.It has great development potential in the field of self-powered technology and intelligent sensing.In response to the guidance of circular development by the state,this work combines the NG with environmental problems,and makes the plastic triboelectric nano-generator(TENG)based on waste plastic bags in the environment.It has the advantages of self-power supply and good environmental adaptability,which can not only reduce environmental pollution,but also alleviate energy consumption to a certain extent.In this paper,starting from the preparation process and theoretical model of TENG,its practical applications in the field of energy collection and sensing are explored.Firstly,three kinds of plastic TENGs,PA-PVC-TENG,PA-PE-TENG and PVC-PE-TENG,were fabricated by vacuum sputtering technique 4*110s.The complete manufacturing process of the plastic TENGs was introduced.The infrared diffraction patterns and nanostructures of various plastic films were analyzed.And the relevant experimental test platform was built.The V-Q-x relationship of the TENG was studied.The capacitance model and the first-order equivalent circuit model of the TENG were established.Secondly,the voltage and current signal characteristics of the plastic TENG were analyzed,and its working process was described step by step,and the finite element simulation was carried out.In order to simulate the variability of the actual environment,three kinds of plastic TENGs were tested under different spacing,pressure and frequency,respectively.The results and changes were compared and analyzed theoretically,and the relevant equations were deduced according to the model.The mechanical durability of the plastic TENG was demonstrated by more than 3000 cycle tests.The impedance matching characteristic test was carried out,the best matching resistance was analyzed,and the relationship between the NG and capacitor charging was studied.It is proved that the TENG has great potential as an energy supply for electronic devices and as a sensor.In order to improve the output performance of the NG,a sandwich type hybrid TENG and a multi-layer vertical structure model were designed and the parallel test was carried out.Combined with the supercapacitor as the self-powered system,the energy storage mechanism was explained by decomposing the mechanical movement process,and the power supply for micro-electronic devices was realized.Finally,the self-powered humidity sensor and body motion monitoring sensor based on plastic TENG were designed and manufactured,and the feasibility and application tests of the sensors were carried out.The relationship between the output of the TENG and the relative humidity of the environment was studied.The sensitivity and reversibility between the humidity sensor and the humidity of the environment and Li Cl aqueous solution were tested.The human motion monitoring test was carried out,and it was proved that the body motion monitoring sensor could sensitively recognize the bending motion and bending angle change of human joints.The remote emergency call microsystem was designed,and its application potential in the field of human motion monitoring and health monitoring was demonstrated.