Design And Implement Of Nylon-modified Nonmetallic Stretchable Triboelectric Nanogenerator

In the era of Internet of Things,the increasing number of wearable devices and unattended sensor networks pose new challenges to traditional power supply technologies in terms of miniaturization,biocompatibility and service life.Compared with traditional energy,nano energy on the micro energy scale is more suitable as the energy source of low-power electronic devices.Due to its wide material sources,flexible structure and diverse working patterns,triboelectric nanogenerators(TENG)have a promising application prospect in the fields of electronic skin,biomedicine,sensor network,wearable devices and so on.A large number of studies have shown that material characteristics is also one of the important factors affecting TENG’s output performance in addition to the device structure.For materials,rigid triboelectric materials tend to have higher performance,while elastic materials have lower output performance.In the process of flexible design of TENG,two problems often occur: first,the large difference of Young’s modulus leads to the decrease of structural reliability after heterogeneous integration;second,rigid materials limit the stretchability of devices,which ultimately leads to unsatisfactory output performance,reliability and application range,limits the application of high-performance materials in flexible devices,hinders the development of stretchable triboelectric nanogenerators,and still fails to meet the requirements of wearable devices in general.Considering the electrical and mechanical properties of the material,silicone rubber is selected as the matrix to produce stretchable TENG.A stretchable nylon-modified tribological nanogenerator(NM-TENG)with uniform substrate is designed.The research focuses on the integration of friction structure,the establishment of mechanical and electrical models,flexible sensing and energy exchange mechanism.By doping high temperature vulcanized silicone rubber with filler material,the flexibility of the functional layers of the stretchy friction nanogenerator and the homogeneous integration between the layers are realized.The surface wear caused by rigid contact is reduced,the interlayer stripping caused by heterogeneous integration process is completely solved,and the tensile property of the device is realized.The idea of "meshes" is innovatively put forward,which directly modifies the flexible matrix surface with powder material,and forms a stretch-able macroscopic surface with countless tiny inelastic surfaces through elastic connection,thus solving the problem of effective integration between inelastic material and elastic matrix.A systematic electrical performance test was conducted to evaluate the power generation capacity of NM-TENG at three levels: output performance,drive capability and practical application.The results show that the output performance of TENG modified with nylon increased by 39% under the contact-separation mode.The open circuit voltage and short circuit current of NM-TENG with a size of 5cm×6cm which has good reliability can reach up to 1.17 kV and 138 μA,respectively.The maximum instantaneous power can reach up to 33.8 mW.The generated energy,after full-wave rectification,can not only directly light up 480 LEDs,but also be effectively collected by the capacitor and drive a low-power electronic clock.In addition,NM-TENG can effectively generate electricity under extrusion,bending,twisting and other conditions,and can effectively collect human movement energy,so it has a broad application prospect in the field of wearable nanogenerators.