High-sensitivity and ultra-broad linear working region flexible piezoresistive pressure sensors based on PDMS/CNT/TPU

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-22 DOI:10.1016/j.jallcom.2024.177711

Zhiwen Chen, Jingchen Ma, Xiaoyu Zhang, Aixiang Wei, Ningqi Luo, Yuding He, Yu Zhao, Zhen Liu, Jiaxiong Xu

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引用次数: 0

Abstract

Designing and fabricating flexible piezoresistive pressure sensors (FPPS) with simultaneous high sensitivity and a broad linear working region remains a considerable challenge. In this work, thermoplastic polyurethane (TPU) fiber films were first prepared via electrospinning. Then, the CNTs were anchored onto the surface of a TPU ﬁber films via ultrasonication as the driving force. Finally, polydimethylsiloxane (PDMS) was used to modify the CNT/TPU and obtain the PDMS/CNT/TPU composite materials. The electrical and mechanical properties of CNT/TPU and PDMS/CNT/TPU were studied. The sensor performances of FPPS based on CNT/TPU and PDMS/CNT/TPU were analyzed and compared. These results prove that the sensitivity of FPPS is significantly improved after the PDMS modification. The optimized PDMS/CNT/TPU FPPS has a sensitivity of 1.43 kPa^-1 in a ultra-broad linear working region of 0-2500 kPa and cycling stability over 6000 cycles. FPPS has been successfully used to monitor physiological signals and human movements, which indicates great potential for wearable electronics and human-machine interfaces.

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基于 PDMS/CNT/TPU 的高灵敏度、超宽线性工作区域柔性压阻压力传感器

设计和制造同时具有高灵敏度和宽线性工作区域的柔性压阻压力传感器（FPPS）仍然是一项相当大的挑战。在这项工作中，首先通过电纺丝制备了热塑性聚氨酯（TPU）纤维膜。然后，以超声波为驱动力，将 CNT 固定在 TPU 纤维薄膜的表面。最后，使用聚二甲基硅氧烷（PDMS）对 CNT/TPU 进行改性，得到 PDMS/CNT/TPU 复合材料。研究了 CNT/TPU 和 PDMS/CNT/TPU 的电气和机械性能。分析并比较了基于 CNT/TPU 和 PDMS/CNT/TPU 的 FPPS 传感器性能。这些结果证明，经过 PDMS 改性后，FPPS 的灵敏度明显提高。优化后的 PDMS/CNT/TPU FPPS 在 0-2500 kPa 的超宽线性工作区域内灵敏度为 1.43 kPa-1，循环稳定性超过 6000 次。FPPS 已成功用于监测生理信号和人体运动，这表明它在可穿戴电子设备和人机界面方面具有巨大潜力。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.