Enabling Longitudinal Respiration Monitoring Using Vapor-Coated Conducting Textiles.
Enabling Longitudinal Respiration Monitoring Using Vapor-Coated Conducting Textiles.
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DOI：
10.1021/acsomega.1c04616
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发表时间：
2021-11-30
期刊：
影响因子：
4.1
通讯作者：
Andrew TL
中科院分区：
文献类型：
--
作者：
Allison LK;Rostaminia S;Kiaghadi A;Ganesan D;Andrew TL
可穿戴传感器允许在自然环境中进行便携式长期健康监测。最近，对能够可靠地监测呼吸的技术的需求有所增加，呼吸可以指示心脏病、哮喘和呼吸道病毒感染。然而，到目前为止，最可靠的呼吸监测系统涉及到一个紧密佩戴的胸带，不利于纵向监测。在这里，我们报告说，准确的呼吸监测可以使用安装在面罩内的基于织物的湿度传感器。我们的湿度传感器是使用棉织物与持久的p-掺杂的共轭聚合物，聚（3，4-乙撑二氧噻吩）：氯化物（PEDOT-Cl），使用先前报道的化学气相沉积工艺。气相沉积的聚合物涂层随着局部湿度的增加（例如当佩戴者呼吸时面罩内经历的湿度变化）显示出稳定、快速和可逆的电导率变化。因此，当集成到面罩中时，PEDOT-Cl涂层棉湿度传感器能够将呼吸转换为电信号。内置湿度传感器的面罩能够区分深呼吸和浅呼吸，以及呼吸和说话。内置传感器的面罩平台在行走和坐下时也能正常工作，在室内和室外环境中提供同样高的信号质量。此外，我们表明，面罩可以佩戴很长一段时间，信号质量的下降可以忽略不计。
Wearable sensors allow for portable, long-term health monitoring in natural environments. Recently, there has been an increase in demand for technology that can reliably monitor respiration, which can be indicative of cardiac diseases, asthma, and infection by respiratory viruses. However, to date, the most reliable respiration monitoring system involves a tightly worn chest belt that is not conducive to longitudinal monitoring. Herein, we report that accurate respiration monitoring can be effected using a fabric-based humidity sensor mounted within a face mask. Our humidity sensor is created using cotton fabrics coated with a persistently p-doped conjugated polymer, poly(3,4-ethylenedioxythiophene):chloride (PEDOT-Cl), using a previously reported chemical vapor deposition process. The vapor-deposited polymer coating displays a stable, rapid, and reversible change in conductivity with an increase in local humidity, such as the humidity changes experienced within a face mask as the wearer breathes. Thus, when integrated into a face mask, the PEDOT-Cl-coated cotton humidity sensor is able to transduce breaths into an electrical signal. The humidity sensor-incorporated face mask is able to differentiate between deep and shallow breathing, as well as breathing versus talking. The sensor-incorporated face mask platform also functions both while walking and sitting, providing equally high signal quality in both indoor and outdoor contexts. Additionally, we show that the face mask can be worn for long periods of time with a negligible decline in the signal quality.
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