Department of Chemistry, Renmin University of China , Beijing 100872, China.
Institute of Chemistry, The Chinese Academy of Sciences (CAS) , Beijing 100190, China.
ACS Appl Mater Interfaces. 2017 Oct 11;9(40):34687-34695. doi: 10.1021/acsami.7b10411. Epub 2017 Sep 28.
Wearable pressure sensors have attracted increasing attention for biomechanical monitoring due to their portability and flexibility. Although great advances have been made, there are no facile methods to produce sensors with good performance. Here, we present a simple method for manufacturing flexible and self-powered piezoelectric sensors based on LiNbO (LN) particles. The LN particles are dispersed in polypropylene (PP) doped with multiwalled carbon nanotubes (MWCNTs) by hot pressing (200 °C) to form a flexible LN/MWCNT/PP piezoelectric composite film (PCF) sensor. This cost-effective sensor has high sensitivity (8 Pa), fast response time (ca. 40 ms), and long-term stability (>3000 cycles). Measurements of pressure changes from peripheral arteries demonstrate the applicability of the LN/MWCNT/PP PCF sensor to biomechanical monitoring as well as its potential for biomechanics-related clinical diagnosis and forecasting.
可穿戴压力传感器由于其便携性和灵活性，在生物力学监测方面受到了越来越多的关注。尽管已经取得了很大的进展，但仍然没有简单的方法来制造性能良好的传感器。在这里，我们提出了一种基于 LiNbO（LN）颗粒制造柔性自供电压电传感器的简单方法。通过热压（200°C）将 LN 颗粒分散在多壁碳纳米管（MWCNT）掺杂的聚丙烯（PP）中，形成柔性 LN/MWCNT/PP 压电复合膜（PCF）传感器。这种具有成本效益的传感器具有高灵敏度（8 Pa）、快速响应时间（约 40 ms）和长期稳定性（>3000 次循环）。对周围动脉压力变化的测量表明，LN/MWCNT/PP PCF 传感器适用于生物力学监测，并且有可能用于与生物力学相关的临床诊断和预测。
