Flexible strain/pressure sensors play a vital role in flexible wearable electronics. In recent years, carbonized fabric-based flexible strain/pressure sensors are emerging due to their excellent flexibility and sensing performance, as well as facile preparation and low cost. Sensing performance is a key indicator for evaluating strain/pressure sensors. However, the study on the process variables affecting the sensing performance of carbonized fabric-based strain/pressure sensors is lacking to date. In this paper, a flexible pressure sensor based on carbonized fabric/thermoplastic polyurethane was prepared by simple carbonization. By setting different carbonization temperatures (600–1000 °C) and flexible substrate solution concentrations (4–10%), their influence on the sensor sensing performance was explored and a series of characterizations and tests were implemented under different process conditions. The results showed that the carbonization temperature and substrate concentration greatly influence the sensing performance of the sensor. Furthermore, the flexible pressure sensor using carbonized fabric carbonized at 800–900 °C and substrate solution with 6% concentration possesses superior sensing performance.

中文翻译：

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碳化温度和底物浓度对柔性压力传感器传感性能的影响

柔性应变/压力传感器在柔性可穿戴电子产品中起着至关重要的作用。近年来，基于碳化织物的柔性应变/压力传感器因其优异的柔韧性和传感性能，以及制备简便和成本低而不断涌现。传感性能是评估应变/压力传感器的关键指标。然而，迄今为止，缺乏对影响碳化织物应变/压力传感器传感性能的过程变量的研究。本文通过简单碳化制备了一种基于碳化织物/热塑性聚氨酯的柔性压力传感器。通过设置不同的碳化温度 (600–1000 °C) 和灵活的底物溶液浓度 (4–10%)，探索了它们对传感器传感性能的影响，并在不同的工艺条件下实施了一系列表征和测试。结果表明，碳化温度和底物浓度对传感器的传感性能有很大影响。此外，使用在 800-900°C 下碳化的碳化织物和 6% 浓度的基板溶液的柔性压力传感器具有优异的传感性能。