Fabrication And Performance Study Of Fabric-Based Triboelectric Nanogenerator

With the development of science and technology,wearable electronic devices have gradually entered people’s life and been widely used by people.Smart wearable devices such as smart wristbands and smart watches have been widely used by people to monitor health,motion sensing and real-time communication,which greatly enrich and facilitate people’s lives.However,due to the strong dependence of such wearable electronic devices on chemical batteries,their development towards portability and security is greatly restricted.Fabric has gradually become the base material of self-powered wearable power for wearable electronic products due to its excellent comfort and safety.At the same time,triboelectric nanogenerator are receiving increasing attention as a new type of energy collector that can convert various forms of green energy,including wave waves,human movement,rain drops and air flow,into electricity for external circuits.The combination of triboelectric nanogenerator and fabric creatively promotes the birth of fabric-based triboelectric nanogenerator,which provides a new solution for the use of triboelectric nanogenerators as power supply systems.In this thesis,soft fabric-based triboelectric nanogenerators,which can be easily implanted into clothing,collect energy from various forms of human movement and supply it to external circuits.The main contents are as follows:(1)The wide temperature stable composite film was prepared by spinning barium titanate ceramic powder and polydimethylsiloxane on silver fabric.On this basis,a stable over a wide temperature range fabric-based triboelectric nanogenerator is fabricated,which is flexible and can be implanted into clothing.Experimental results show that the 3×3 cm~2 stable over a wide temperature range fabric-based triboelectric nanogenerator can generate open-circuit voltage of 72.2V and short-circuit current of1.82μA,and can light 53 commercial green diodes simultaneously.After charging the4.7μf capacitor for 295 seconds,the calculator can operate normally for 3s.At the same time,the stable over a wide temperature range fabric-based triboelectric nanogenerator is improved at-10℃to 50℃,and the performance change is less than15%,which greatly improves the adaptability to the environment.(2)In order to protect the environment,the triboelectric nanogenerator was made by using recycled polyethylene and waste Nylon white coat.With an energy density of 1.104μW/cm~2,the triboelectric nanogenerator collects energy from finger touch to drive an electronic display displaying the word"1895".A self-powered Morse code generator was constructed by using a fabric-based triboelectric nanogenerator and"T","J"and"U"electrical signals were successfully generated.(3)Polydimethylsiloxane and carbon nanorods were mixed evenly and the film was prepared on the silver fabric base by the new brush method,and the performance of triboelectric nanogenerator was improved.Compared with the traditional dip coating method,the method is proved to be efficient.The theory of capacitance structure is studied and the incorporation of carbon nanotubes is proved experimentally and theoretically.Fabric-based triboelectric nanogenerator are embedded in insole and socks to create a self-powered human motion pattern monitor,which can distinguish different forms of motion or collect high voltage energy by monitoring the electrical signals generated by the volunteers.