Investigation of Electro-Mechanical Properties of SR/CNT/SR Flexible Strain Sensor Composites

Abstract

In recent years, flexible strain sensors with high sensitivity and a wide sensing range have been developed for biosensors, wearable sensors, electronic skin, and soft robots. In this study, SR/CNT/SR composite-based sensors were fabricated using the sandwich manufacturing method. The sensors were then analyzed for electro-mechanical properties to test their performance. The flexible strain sensor showed a high sensitivity of 76.60 at 0-80% strain range. In addition, the sensor also showed a high linearity of 0.978 in one linear region. The sensor also constantly changes relative resistance at 10 cycles in the 0-40% range. While in the 45-80% strain range, the relative resistance value fluctuates. This is due to the large crack in the sensor when stretched. This sensor also has a fast response time of about 80 ms and a fast recovery of around 95 ms. This flexible strain sensor is also stable for durability testing at 500 loading and release cycles.