Layered MXene/Aramid Composite Film for a Soft and Sensitive Pressure Sensor
Layered MXene/Aramid Composite Film for a Soft and Sensitive Pressure Sensor
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用于柔软灵敏压力传感器的分层 MXene/芳纶复合薄膜
DOI：
10.1021/acsami.2c01914
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Chenghao Deng
中科院分区：
文献类型：
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作者：
Erming Su;Fengming Wu;Siqi Zhao;Yeti Li;Chenghao Deng
近年来，二维材料MXene在可穿戴电子和压力传感器领域显示出巨大的优势。对于先进的应用，如何通过简单的制备原理实现超薄厚度和极大柔性的共形压力传感器，同时保持其高灵敏度和宽检测范围，仍然是高性能压力传感器发展的关键挑战。在这里，我们提出了一种优化的温和的LiF/HCl刻蚀方案，并成功地实现了高浓度(>；25 mg/mL)的少层Ti3C2TxMXene的制备。将制备的MXene与芳纶纳米纤维(ANF)相结合，设计了一种基于MXene/ANF复合材料的超薄层状压力传感器。与ANF复合后，膜的机械强度大大提高，而纯MXene膜是脆弱的。该传感器的灵敏度高达16.7kPa-1，检测范围宽(>；100kPa)，厚度仅为10μm，具有很大的柔韧性，可伸缩性高达10%，这对实际的传感器是非常有利的。展示了该传感器在人体运动监测和从低压(人体脉搏)到高压(俯卧撑)人机界面方面的广阔应用前景。
In recent years, the two-dimensional material MXene has shown great advantages in the field of wearable electronics and pressure sensors. Toward advanced applications, achieving a conformal pressure sensor with ultrathin thickness and great flexibility through a simple preparation principle, while maintaining its high sensitivity and wide detection range, is still a key challenge for the development of high-performance pressure sensors. Herein, we proposed an optimized mild LiF/HCl etching scheme and successfully achieved a high-concentration (>25 mg/mL) preparation of few-layer Ti3C2TxMXene. Combining the prepared MXene with an aramid nanofiber (ANF), we designed an ultrathin layered pressure sensor based on an MXene/ANF composite through layer-by-layer suction filtration. The mechanical strength is greatly enhanced by composition with the ANF, while the pure MXene film is fragile. The sensor achieves a high sensitivity of 16.7 kPa–1, wide detection range (>100 kPa), only 10 μm thickness, great flexibility, and up to 10% stretchability, which are greatly beneficial to practical sensors. We demonstrated the wide application perspective of the sensor in human motion monitoring and human–machine interfaces from low pressure (human pulse) to high pressure (push-up).