自修复聚氨酯导电弹性体的制备及其在柔性拉伸/压缩双应变传感器中的应用研究

自修复柔性应变传感器在应变检测领域有着巨大的应用前景，但是如何快速制备出具有优良力学性能和重复修复性，并能同时灵敏检测拉伸/压缩应变的柔性传感器仍然是一个亟待解决的问题。本项目拟设计合成无需外界刺激即可快速自修复的双硫键型热塑性聚氨酯，结合具有修复功能的室温液态金属纳米颗粒和力学增强性能的碳纳米管，制备出无外界刺激即可重复快速修复的力学性能增强型热塑性聚氨酯导电弹性体。设计合理的微结构，利用3D打印方法将制备的聚氨酯导电弹性体快速构造成可在宽应变范围内同时灵敏检测拉伸/压缩形变的柔性应变传感器，并将其应用到人体活动监测中。本项目的实施将为高性能自修复柔性应变传感器的设计与制备提供一定的指导意义，同时也对柔性应变传感器工业化生产和广泛应用有一定的推动作用。

Flexible strain sensor with self-healing ability has a great applications in the filed of strain detection, however it remains a challenge to prepare a flexible strain sensor with great mechanical properties, excellent repeatable self-healing ability, and dual-function to sensitively detect the stretch/compressive deformation. This project will design and synthesis a thermoplastic polyurethane with S-S bond that can be fast healed without external stimulus, then combine it with self-healing liquid metal nanoparticles and carbon nanotubes, to get a conductive thermoplastic polyurethane elastomer with non-external stimulated self-healing ability and enhanced mechanical properties. Designing certain micro-structurals and using 3D printing technique to convert the synthesized conductive polyurethane elastomer into a flexible sensor. Such sensor can sensitively detect the stretch/compressive deformation in a wide range, and can be used for human motion monitoring. This work will be a guidance to the design and fabrication of the high performance flexible strain sensor with self-healing ability, and will push forward the industrial-scale production and widespread use of the flexible strain sensor.