<br>由MXene、CNT和TPU/PSF非对称结构薄膜制成的具有大拉伸恢复的应变传感器在人体健康监测中的应用,ACS Applied Materials & Interfaces

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由MXene、CNT和TPU/PSF非对称结构薄膜制成的具有大拉伸恢复的应变传感器在人体健康监测中的应用
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-12-12 , DOI: 10.1021/acsami.3c11328
Xiaoyu Cui ₁ , Chengjing Miao ₁ , Shaowei Lu ₁ , Xingmin Liu ₁ , Yuxuan Yang ₁ , Jingchao Sun ₂

Affiliation

设计具有宽传感范围、高灵敏度和高稳定性的柔性可穿戴传感器是一个具有未来前景的脆弱研究方向。本文通过在TPU/PSF多孔薄膜中自组装导电填料，获得了具有优异传感器性能的Ti ₃ C ₂ T _x MXene/碳纳米管（CNT）/热塑性聚氨酯（TPU）/聚砜（PSF）复合薄膜。通过真空过滤形成不对称结构，并通过相转化法制备多孔薄膜。该复合薄膜的上部具有由 MXene/CNT 填充的指状“空腔”，可减少拉伸过程中导电网络中的微裂纹，下部具有较小孔径的相对致密的树脂皮层，有助于恢复过程。 MXene/CNTs/TPU/PSF薄膜传感器的独特层结构，厚度为46.95μm，仅包含0.0339 mg/cm ²单壁碳纳米管（SWNT）和0.348 mg/cm ² MXene，提供功能范围（ 0-80.7%）、高灵敏度（高达1265.18）、优异的稳定性和耐用性（2300次疲劳测试下稳定传感，可耐受初始电阻），在大应变下耐循环，导电网络严重损坏。最后，MXene/CNTs/TPU/PSF薄膜传感器可用于实时监测脉搏、吞咽、脚尖和各种关节弯曲，并分发有效的电信号。本文表明MXene/CNTs/TPU/PSF薄膜传感器在实际应用中具有广阔的前景。

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Strain Sensors Made of MXene, CNTs, and TPU/PSF Asymmetric Structure Films with Large Tensile Recovery and Applied in Human Health Monitoring

Designing flexible wearable sensors with a wide sensing range, high sensitivity, and high stability is a vulnerable research direction with a futuristic field to study. In this paper, Ti₃C₂T_x MXene/carbon nanotube (CNT)/thermoplastic polyurethane (TPU)/polysulfone (PSF) composite films with excellent sensor performance were obtained by self-assembly of conductive fillers in TPU/PSF porous films with an asymmetric structure through vacuum filtration, and the porous films were prepared by the phase inversion method. The composite films consist of the upper part with finger-like “cavities” filled by MXene/CNTs, which reduces the microcracks in the conductive network during the tensile process, and the lower part has smaller apertures of a relatively dense resin cortex assisting the recovery process. The exclusive layer structure of the MXene/CNTs/TPU/PSF film sensor, with a thickness of 46.95 μm, contains 0.0339 mg/cm² single-walled carbon nanotubes (SWNTs) and 0.348 mg/cm² MXene only, providing functional range (0–80.7%), high sensitivity (up to 1265.18), and excellent stability and durability (stable sensing under 2300 fatigue tests, viable to the initial resistance), endurably cycled under large strains with serious damage to the conductive network. Finally, the MXene/CNTs/TPU/PSF film sensor is usable for monitoring pulse, swallow, tiptoe, and various joint bends in real time and distributing effective electrical signals. This paper implies that the MXene/CNTs/TPU/PSF film sensor has broad prospects in pragmatic applications.

更新日期：2023-12-12

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