Flexible electrospinning pressure sensing film with wide pressure detection range and high sensitivity

Abstract

The preparation of flexible sensors with high sensitivity, wide detection range and good stability is a hot and difficult topic in recent years. Therefore, it is necessary to develop a pressure sensor with high sensitivity and wide pressure range. In this paper, multiwall carbon nanotubes (MWCNT)/thermoplastic polyurethane elastomer rubber (TPU) nanofiber conductive films with microporous structure are prepared by electrospinning using MWCNT as a conductive material. Then, a flexible pressure sensor with a sandwich structure is prepared while the film is used as the central layer. The pressure detection range can reach 364 kPa during testing. And when the pressure range is 201 ∼ 364 kPa, the sensitivity is still as high as 0.0658 kPa−1, with fast response time and recovery time. The sensor has good stability in cycle testing and still maintains high sensitivity after washing, proving that it has good washing resistance. The sensor has great potential for application in sports and health monitoring.