An Antisweat Interference and Highly Sensitive Temperature Sensor Based on Poly(3,4-ethylenedioxythiophene)–Poly(styrenesulfonate) Fiber Coated with Polyurethane/Graphene for Real-Time Monitoring of Body Temperature

Abstract

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 (R 2 = 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.

Multifunctional MXene/PEDOT:PSS-Based Phase Change Organohydrogels for Electromagnetic Interference Shielding and Medium-Low Temperature Infrared Stealth

“…Meanwhile, the PCOH returns to the original position after experiencing different compressive strains (30%, 60%), which demonstrates the reversibility of strain sensing. PMPχ-SSD sensors possess excellent mechanical and strain sensing capabilities, which enables them to be used for monitoring motion. , A picoammeter was connected to the copper foil on the PMP2-SSD sensor to output different signals through different movements and amplitudes. As shown in Figure d,e, PMP2-SSD sensors could capture signals from different actions, such as stretching, pressing, and twisting.…”

Large-Scale Wearable Textile-Based Sweat Sensor with High Sensitivity, Rapid Response, and Stable Electrochemical Performance

“…Figure a depicts the structure of the TPFV/CPP yarn, which consists of a carbon fiber conductive layer, PEDOT:PSS (as solid contact, SC), and an ion-selective membrane layer from inside to outside. Poly­(3,4-ethylenedioxythiophene) (PEDOT) is one of the most widely used conductive polymers in sweat sensors, with high capacitance and good electronic conductivity. − In the mixed solution of 5 mmol/L K 3 [Fe­(CN) 6 ] and 0.2 mmol/L KCl, the cyclic voltammetric (CV) curves of the carbon fiber and CPP fiber were compared at the same scanning rate (Figure b). The results showed that the CPP fiber showed an obvious reoxidation peak compared with the carbon fiber, implying that the modification of PEDOT:PSS improved the electrical conductivity of the carbon fiber and thus accelerated the electron transfer rate between the electrode and the solution.…”

Highly Stretchable and Multimodal MXene/CNTs/TPU Flexible Resistive Sensor with Hierarchical Structure Inspired by Annual Ring for Hand Rehabilitation

“…Recently, researches on wearable electronic devices that can visually monitor individual health and keep track on the progress of patients’ physical recovery in real time have attracted widespread attention. , Wherein, flexible sensors have become one of the major research hotspots due to their ability to maintain excellent conformal contact with human skin, which can be comfortably worn in daily life. , Currently, researchers have developed amounts of flexible sensors based on different mechanisms (capacitive, , resistive, − friction electric, , piezoelectric, inductive, etc.). Of these, flexible resistive sensors are considered ideal candidates for next-generation wearable devices due to their relatively simple mechanism of working, tunable mechanical properties, and feasible preparation process .…”