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碳纳米管薄膜可作为应变传感器用于结构损伤的健康监测。采用机械搅拌、超声处理和高速离心等分散工艺将多壁碳纳米管单分散后,通过真空吸滤法制备碳纳米管薄膜。对碳纳米管薄膜传感器进行了深入的研究,设计了一种高灵敏度的碳纳管薄膜应变传感器,与结构基体一体成型。弯曲应变传感实验表明碳纳米管薄膜传感器在不同的应变范围、不同的循环次数、不同的温度范围等条件下都具有良好的应变传感特性。结果表明碳纳米管薄膜传感器灵敏度较高,灵敏度系数为188.31(0~22 500με),且具有较好的应变传感可逆性和可重复性。
Carbon nanotube films can be used as strain sensors for structural damage monitoring. After the multi-walled carbon nanotubes were singly dispersed by mechanical stirring, ultrasonic treatment and high-speed centrifugation, the carbon nanotube films were prepared by vacuum suction filtration. The carbon nanotube thin film sensor has been deeply studied, and a high sensitivity carbon nanotube thin film strain sensor has been designed and integrated with the structural substrate. The bending strain sensing experiments show that the carbon nanotube film sensor has good strain sensing characteristics under different strain ranges, different cycles and different temperature ranges. The results show that the carbon nanotube thin film sensor has high sensitivity with a sensitivity coefficient of 188.31 (0 ~ 22 500με), good reversibility and repeatability of strain sensing.