Preparation And Properties Of Triboelectric Nanogenerator Based On Silicone Rubber Core Fiber

With the development of the times,the demand for energy rises sharply,and the development and utilization of sustainable energy is widely concerned.Triboelectric nanogenerator（TENG）,as a green and sustainable energy harvesting and conversion technology,has broad application potential in portable energy and smart wearable fields.However,the development of traditional thin-film TENG in the wearable field is limited due to a number of drawbacks such as insufficient air permeability and poor comfort.The fiber based TENG（F-TENG）has become a focus in the field of wearable energy and self-actuated sensing due to its good air permeability,comfort and flexibility.However,the continuous F-TENG preparation method and electrical output performance still have some shortcomings.Therefore,this paper carries out in-depth research on the optimization of F-TENG’s preparation method and the improvement of its electrical output performance,which mainly includes the following aspects:Using silicone rubber as triboelectric material and silver-coated conductive fiber as electrode,a core-structure fiber triboelectric nanogenerator（CF-TENG）was prepared by using a self-developed continuous device.The influences of solidification bath temperature and propulsion speed on the morphology and output performance of CF-TENG were investigated.When the solidification bath was 60℃and the propulsion speed was 6 m L/h,The obtained CF-TENG possesses excellent mechanical tensile and flexible properties,and exhibits excellent output performance.High electrical output（17.5V,0.1μA）can be obtained when a single CF-TENG（5cm）is contacted with nylon material at a frequency of 1 Hz.Secondly,it is prepared into fabric by warp and weft weaving method,which can be used to collect energy from human activities.Its voltage,current and maximum instantaneous power density are 290 V,16μA and0.52 W/m²,respectively.It can simultaneously light up 56 LEDs lights and charge capacitors.Finally,the CF-TENG,as a wearable self-powered sensor,can be applied to the field of human rehabilitation detection and sports standard monitoring.By adding a dielectric layer between the friction material and the electrode,charge dissipation can be reduced and the output performance of CF-TENG can be effectively improved.Among the tested dielectric layers,such as thermoplastic polyurethane（TPU）,fluoro-rubber（FKM）,fluoro-resin（THV）and polydimethylsiloxane（PDMS）,FKM can improve the electrical performance output the most,and its voltage,current and charge increase by 36.6%,37.8%and36.8%,respectively,compared with that of CF-TENG without dielectric layer.In addition,the surface charge density of silicone rubber can also be improved by adopting excellent inorganic electret-sio²nanoparticles,and the influence of Si O₂ with different mass fractions on the output performance of CF-TENG can be studied.When the Si O₂ mass fraction is 1%,Compared with CF-TENG without Si O₂,the voltage,current and charge increase by 33.3%,35.8%and 33.3%,respectively.By further integrating the two methods,the output performance of the CF-TENG is further improved successfully.The voltage,current and charge capacity of the CF-TENG are increased by 47.2%,52.6%and 60.2%respectively,and the reliability of the CF-TENG as an energy harvesting device is verified,which provides a new idea and method for the application of wearable technology.It has positive significance to promote the development of energy collection and utilization technology.