基于PVDF和PTFE摩擦电机制的自供电温度传感

Self-Powered Temperature Sensor Based on PVDF and PTFE Triboelectric Mechanism

针对温度监测外部电源限制寻找一种柔性自供电、响应时间快、具有长期循环稳定性的温度传感器件具有重要的实际应用价值.介绍了一种基于摩擦机制的接触分离式自供电温度传感器制备方法.利用聚偏氟乙烯(PVDF)的热释电性增强摩擦层接触表面的电荷密度,PVDF表面Ag电极被用作底部电极层和摩擦层.聚四氟乙烯(PTFE)作为顶部摩擦层其与顶部电极导电铜箔相连接.将中空结构的间隔层(Kapton)置于PTFE膜和Ag电极之间形成空腔结构;研究结果表明,在295~335 K温度范围内,传感器输出电压随温度增加呈线性增加,并且其温度响应时间大约为0.1 s,灵敏度为0.25 V/K,5500次周期性接触分离循环仍具有优异的稳定性.该摩擦发电机在安全监测,自供电温度传感方面具有潜在应用价值.

It is of great practical value to find a kind of temperature sensor with flexible self-powered,fast response time and long-term cycle stability.A fabrication method of a contact-separation type temperature sensor based on triboelectric mechanism was introduced.The pyroelectric property of polyvinylidene fluoride(PVDF)was used to enhance the charge density of the contact surface of the triboelectric layer.Ag electrode on the surface of PVDF was used as the bottom electrode layer and triboelectric layer.Polytetrafluoroethylene(PTFE)as the top triboelectric layer was connected with the top electrode conductive copper foil.The spacer layer(Kapton)with hollow structure was placed between the PTFE film and Ag electrode to form a cavity structure.The results show that the output voltage of the sensor increases linearly with the temperature range from 295 K to 335 K.And its temperature response time was approximately 0.1 s and its sensitivity was 0.25 V/K.It has excellent stability in 5500 periodic contact separation cycles.The triboelectric generator has potential application value in safety monitoring and self-powered temperature sensing.