School of Textile Science and Engineering, Key Laboratory of Functional Textile Material and Product of Ministry of Education, Institute of Flexible Electronics and Intelligent Textile, Xi'an Polytechnic University, Xi'an 710048, China.
School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China.
ACS Nano. 2023 Nov 14;17(21):21073-21082. doi: 10.1021/acsnano.3c04246. Epub 2023 Oct 24.
Body temperature is an important indicator of human health. The traditional mercury and medical electronic thermometers have a slow response (≥1 min) and can not be worn for long to achieve continuous temperature monitoring due to their rigidity. In this work, we prepared a skin-core structure polyurethane (PU)/graphene encapsulated poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) temperature-sensitive fiber in one step by combining wet spinning technology with impregnation technology. The composite fiber has high sensitivity (-1.72%/°C), super-resolution (0.1 °C), fast time response (17 s), antisweat interference, and high linearity ( = 0.98) in the temperature sensing range of 30-50 °C. The fiber is strong enough to be braided into the temperature-sensitive fabric with commercial cotton yarns. The fabric with good comfort and durability can be arranged in the armpit position of the cloth to realize real-time body temperature monitoring without interruption during daily activities. Through Bluetooth wireless transmission, body temperature can be monitored in real-time and displayed on mobile phones to the parents or guardians. Overall, the fiber-based temperature sensor will significantly improve the practical applications of wearable temperature sensors in intelligent medical treatment due to its sensing stability, comfort, and durability.
体温是人体健康的一个重要指标。传统的水银体温计和医用电子体温计由于其刚性，响应缓慢（≥1 分钟），不能长时间佩戴以实现连续温度监测。在这项工作中，我们通过将湿法纺丝技术与浸渍技术相结合，一步法制备了一种具有皮芯结构的聚氨酯（PU）/石墨烯封装聚（3,4-亚乙基二氧噻吩）-聚（苯乙烯磺酸盐）（PEDOT:PSS）热敏纤维。该复合纤维在 30-50°C 的温度传感范围内具有高灵敏度（-1.72%/°C）、超分辨率（0.1°C）、快速的时间响应（17s）、抗汗水干扰和高线性度（=0.98）。纤维足够强，可以与商业棉线编织成热敏织物。这种织物具有良好的舒适性和耐用性，可以布置在衣服的腋下位置，实现日常活动中不间断的实时体温监测。通过蓝牙无线传输，可实时监测体温，并在手机上显示给家长或监护人。总的来说，由于其传感稳定性、舒适性和耐用性，基于纤维的温度传感器将显著提高可穿戴温度传感器在智能医疗中的实际应用。
