Hidden sweat sensors for long-term continuous monitoring are available

Human sweating is a normal physiological phenomenon, the common way is to secrete visible sweat, but it is also excreted from the body in the form of steam, which is called “hidden sweat”. When the core body temperature exceeds the threshold, the body transfers heat to the surrounding environment through sweating.

The rate of occult sweat loss can effectively assess human skin barrier function (dermatitis, wound healing, etc.) and nervous system activity (emotional stimulation and psychological changes caused by sympathetic nerve excitation, etc.). Existing hidden sweat monitoring methods are not suitable for patients to wear for a long time, and cannot be continuously measured for a long time, so it is imperative to develop a new skin fitting hidden sweat sensor.

The reporter learned from Xiangtan University on February 13 that the research group of Wang Xiufeng, professor of the School of Materials Science and Engineering, used sodium polyacrylate composite two-dimensional transition metal carbon compounds to construct a sensing layer, combined with polydimethylsiloxane-coated superhydrophobic fabrics with nano-oxides, and developed a highly sensitive, rapid response, continuous monitoring and superhydrophobic hidden sweat sensor.

The picture shows a hidden sweat sensor that can be continuously monitored over a long period of time. Photo courtesy of interviewee

The Hidden Sweat Sensor is the size of a camera memory card, small and portable compared to traditional Hidden Sweat Monitors, and its openwork substrate gives the device flexibility and breathability, allowing the fabric to penetrate the Hidden Sweat vapor while avoiding external droplets and internal sweat interference. It is integrated with wireless communication and power supply modules to form a hidden sweat detection platform that continuously monitors the body’s thermal status and skin barrier function, and evaluates the user’s mental activity and environmental comfort.

Wang Xiufeng has long been engaged in the research of soft matter surface interface mechanics and special wettability regulation related to “wearable microfluidics and sensors”, and is committed to the development of non-invasive detection technologies for physiological and medical indicators such as flexible sensors, sweat quantitative collection and real-time analysis patches in hydration environments. According to reports, the study provides a new scheme for the personalized health application of sweat sensors.

Wang Xiufeng (first from left) with his team members. Photo courtesy of interviewee

On February 6, the above research results were published online in ACS Nano, with Liu Yangchengyi, a doctoral student at the School of Materials Science and Engineering of Xiangtan University, as the first author of the paper, master’s students Li Xiaofeng, Yang Hanlin and Zhang Ping as the co-authors of the paper, and undergraduate students Tian Yao and Qian Shun as co-authors. Wang Xiufeng and Cheng Huanyu, a professor at Pennsylvania State University, are co-corresponding authors. Xiangtan University is the first unit of the thesis. (Source: Wang Haohao, China Science News)

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