ABSTRACT In this study, a novel flexible piezoresistive strain sensor was prepared by using polydimethylsiloxane (PDMS) to encapsulate carbonised waste polybenzoxazine (cPBa). Benefiting from the porous conductive framework of cPBa, the infused PDMS endowed the cPBa/PDMS strain sensor with excellent mechanical properties. It was observed that this sensor exhibited both negative and positive piezoresistive effects due to the conductive disconnection/reconnection process of carbon fragments while monitoring compressive deformation. Moreover, it showed a high sensitivity with a gauge factor ( ) of 1954.3 at the strain range of 12–30% and excellent repeatability (up to 1000 cycles). Also, the potential application of this strain sensor in monitoring human body motions was evaluated. This work presents an eco-friendly way to fabricate highly sensitive flexible strain sensors using recycled thermosetting resins.

中文翻译：

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基于碳化废热固性树脂的高灵敏度柔性压阻应变传感器

摘要 在这项研究中，通过使用聚二甲基硅氧烷 (PDMS) 封装碳化废物聚苯并恶嗪 (cPBa)，制备了一种新型柔性压阻应变传感器。受益于 cPBa 的多孔导电框架，注入的 PDMS 赋予 cPBa/PDMS 应变传感器优异的机械性能。据观察，由于碳碎片在监测压缩变形时的导电断开/重新连接过程，该传感器表现出负压阻效应和正压阻效应。此外，它显示出高灵敏度，应变范围为 12-30% 时应变系数 ( ) 为 1954.3，并且具有出色的重复性（高达 1000 次循环）。此外，还评估了这种应变传感器在监测人体运动中的潜在应用。