| With the rapid development of the global economy,the problems of energy crisis and environmental pollution are solved urgently by scientists around the world.With the advent of the Internet of Things,the demand of sensors is increasing rapidly.However,based on the factors of generally expensive,the limited service life,non-reusable feature and serious environmental problems.Therefore,we consider how to harvest energy from the surrounding environment to power these sensors.Since the advent of triboelectric nanogenerators in 2012,its rapidly development has attracted the attention of scientific research organizations in fields ranging from energy to sensors and become one of the current hot research fields.Wind energy is a clean energy ubiquitous in the environment,which has characteristics of widely distributed and easy harvesting.Thanking to the excellent practical performance,waterproof performance,and ease of installation,unpowered hoods are ideal for harvesting wind energy from any direction by the constructed triboelectric nanogenerators.In this paper,in order to improve the output performance of the TENG and reduce wear of the friction layer material,we doped oleic acid into the friction layer material can solve the above problems.We have designed one TENG can drive electronic thermometer and a wireless alarm to monitor the production safety in the plant,based on the main application of the turbine vent being the roof of the house.In order to solve the indoor air pollution problem air,we have therefore also designed self-powered air purification system.In addition,a self-driven temperature and humidity monitoring system and a self-driven alcohol monitoring system have been designed to address the safety of refrigerated transport.The research thus provides design examples and experimental bases for future application scenarios.The main work is as follows:(1)We propose a novel approach to enhance the output performance of triboelectric nanogenerators.The output performance of TENGs was enhanced by adding a small amount of oleic acid with the strong electronegativity and charge retention ability.According to the corresponding research,the TENG fabricated by the PS triboelectric layer with 4.8 wt%oleic acid and Nylon-11can achieve the highest output performance,which can increase the charging speed of capacitors by up to 9 times.In addition,It is a new strategy to add oleic acid into the triboelectric layer,which can not only improve the output performance,but also reduce the friction and wear of TENG.For the TENG-based cathodic protection system,the OCP of the OA-PS-based TENG cathodic protection system drops to 520 m V,which compared with the pure PS TENG cathodic protection system of 360 m V.This OA-PS-based triboelectric nanogenerator not only effectively inhibits the corrosion of metals,but also shows promising potential applications in energy harvesting,energy supply,and self-powered sensors.(2)We design a turbine vent TENG(TV-TENG)that can real-time monitoring and safety early warning of self-powered sensing systems.The TV-TENG is composed of two independent mode TENGs(F-TENGs)and two contact-sliding separation mode TENGs(CSS-TENGs),which are integrated in a turbine vent with a volume of about 0.0064 m~3.F-TENG can harvest mechanical energy more efficiently by the multiple times vibrates after one trigger.The TV-TENG unit generates an open-circuit voltage of up to 178.2 V,a short-circuit current of38.2μA,corresponding to a peak power of 2.71 m W under a 5 MΩexternal load,and can directly light up 120 green light-emitting diodes(LEDs).In addition,our designed TV-TENG can also successfully drive electronic thermometer and wireless alarm system.(3)According to the rotation characteristics of the turbine vent,we designed a turntable triboelectric nanogenerator.As the wind speed increased to 8 m/s,the open-circuit voltage,short-circuit current and transferred charges increased to8.45 k V,5.17μA and 1.43μC,respectively.According to the high-voltage output characteristics of the triboelectric nanogenerator,we prepared a self-powered corona polarization device,which can charge the melt-blown cloth with a high-voltage discharge at the tip of the microneedle array to keep it in a state with a large amount of charge.Since the PMs around the array are also charged and more easily adsorbed by the melt-blown cloth.Through testing,it was found that after charging,the removal rate of PM 0.5 and PM 1.0 by the self-powered purification system reached 90%,and the removal rates of PM 2.5,PM 5.0 and PM 10 all exceeded 98%.The self-powered air purification system has good purification effects on both low and high concentrations of PMs of various particle sizes.(4)We designed two kinds of triboelectric nanogenerators according to the characteristics of vibration energy and generated wind energy of car with the running mode.The contact separation mode triboelectric nanomotor(CS-TENGN)is used to collect the vibration energy of the car,while the independent layer mode triboelectric nanogenerators(F-TENGs)can harvest wind energy in the direction of the car running.The energy collected by the two modes of triboelectric nanogenerators is converted into electric energy and powers electronic devices,which can realize real-time monitoring and safety warning of self-powered sensing systems.The triboelectric nanogenerator can not only drive the Bluetooth thermo-hygrometer to monitor the temperature and humidity in the cargo box,but also successfully drive the alcohol detector and alarm to monitor the driver driving after drinking. |
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