High Sensitivity Flexible Piezoresistive Sensor Based on the Synergistic Effect of Electrical Conductivity and Microstructure

IF 2.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Micro & Nano Letters Pub Date : 2026-09-30 DOI:10.1049/mna2.70037

Shuo Yan, Xiaopeng Li, Shifeng Wang, Xing Liu, Xianjin Hu, Mengyu Liang, Ting-Ting Li, Jie Chen, Hao Liu

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Abstract

We developed a crumpled microstructured piezoresistive sensor based on thermoplastic polyurethane (TPU) and alkalised MXene for high-sensitivity flexible pressure detection over a wide range of 53 Pa–300 kPa. The TPU film with surface microstructures was fabricated via non-woven fabric imprinting, and NaOH treatment converted planar MXene into 3D crumpled nanosheets with fewer surface ─F groups to strengthen TPU–MXene interfacial bonding. Benefiting from the synergistic effect of surface microstructures and crumpled conductive MXene, the sensor delivers segmented sensitivities of 4.14 kPa⁻¹ (53 Pa–21 kPa) and 2.2 kPa⁻¹ (21–63 kPa). It features a rapid 75 ms response time, 80 ms recovery time, tiny loading-unloading hysteresis and stable sensing performance after 6000 compression cycles. Structural and chemical characterisations verify the optimised composite structure and pressure-responsive conductive pathway evolution.

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基于电导率和微结构协同效应的高灵敏度柔性压阻传感器

我们开发了一种基于热塑性聚氨酯（TPU）和碱化MXene的折叠微结构压阻传感器，用于53 Pa-300 kPa范围内的高灵敏度柔性压力检测。采用无纺布印迹技术制备了具有表面微结构的TPU薄膜，NaOH处理将平面MXene转化为具有较少表面F基团的三维皱褶纳米片，增强了TPU - MXene的界面键合。得益于表面微结构和皱褶导电MXene的协同效应，该传感器的分段灵敏度分别为4.14 kPa−1 （53 Pa-21 kPa）和2.2 kPa−1 （21-63 kPa）。它具有快速75毫秒的响应时间，80毫秒的恢复时间，微小的加载-卸载滞后和6000次压缩循环后稳定的传感性能。结构和化学特性验证了优化的复合材料结构和压力响应传导途径的演变。

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来源期刊

Micro & Nano Letters 工程技术-材料科学：综合

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

2.8 months

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