The Preparation And Properties Of Three-dimensional Angle-interlock Woven Structural Wearable Triboelectric Nanogenerator

The triboelectric nanogenerator(TENG)with energy harvesting,low cost,rich raw materials and diverse structure has been developed rapidly.TENG could be used as a wearable power device to replace traditional batteries and supercapacitors to provide sustainable energy.Therefore,the flexible,biocompatible and portable TENG has been a research hotspot.Planar structures based on composite films are usually used in flexible TENG research.However,the structure lacks air permeability and comfort for wearable devices,and is not easy to be stretched and twisted.In this paper,in consideration of the softness and integrity of fabric,a 3D angle-interlock woven(3DAW)fabric-based TENG was designed.Four samples were produced by changing the structure of fabric-based TENG and the materials of z-binding yarns to compare energy harvesting features with fabricated 3DAW-TENG.Afterwards,the 3DAW-TENG applications in flexible self-powered source and self-driven pressure sensors were represented.The main contents of this woek are as follows:(1)A yarn with energy harvesting capacity(TENG yarn)was manufactured to core-shell structure with outer dielectric silicone and inner conductive composite yarn.The electrode was achieved by ultrasonic coating the GO on cotton yarn.This work used a linear motor to measure the electrical output of the TENG yarn.The results showed that it provided excellent,stable and durable mechanical-to-electric conversion performance.(2)The fabricated TENG yarns were placed with two layers as warp yarns,and the z-binding yarns using commercial flexible stainless steel yarns interlaced with each other to form 3DAW-TENG.At the fixed frequency(1 Hz),the electrical output performance measured showed good results.Its Voc,Qsc and Isc were stable at～100V,～35 n C and～2.5μA.And power density has a maximum value of 225 m W/m~2when the fabric connected external resistances.Besides,the 3DAW-TENG always maintain electrical output stability within cyclical test in 500s.(3)The electrical output performance of 3DAW-TENG was compared with other structural fabric-based TENG.Through exploring their structure and working mechanism,it’s found that fabric layers,yarn track of 3DAW structure and double-electrode mode had a positive effect on the results.(4)The 3DAW-TENG was showed as a continuous energy source for wearable devices.It can be converted into electricity to light 100 LED lights by flapping to simulate the vibration energy during human walking and movement.In addition,the fabric-based TENG connected to the capacitor via the rectifier bridge,can charge thermohygrometer and digital watch.In the aspect of self-drive sensors,3DAW TENG was designed to a carpet signal monitor,through the touch of the human body to the carpet,generating output voltage and trigger the voltage sensor to produce signals.This work plays a role in the early warning of outsiders invasion.