A Single Carbon Microyarn-Based Integrated Wearable Textile Sweat Sensor Built into a Hook-and-Loop Fastener

Area of Science:

• Biomedical Engineering
• Materials Science
• Wearable Technology

Background:

• Wearable textile sweat sensors (WTSSs) enable real-time perspiration monitoring during daily activities.
• Existing WTSSs are often permanently integrated into textiles, limiting their adaptability to different clothing types or regions.
• This immobility restricts their use in scenarios requiring flexible placement or changes in apparel.

Purpose of the Study:

• To develop and demonstrate a novel, adaptable WTSS using a stick-to-textile approach.
• To create a system capable of dynamic, on-body, and multiplexed sweat monitoring.
• To overcome the limitations of permanently integrated WTSSs.

Main Methods:

• Development of a single carbon microyarn-based integrated WTSS built into a hook-and-loop fastener (SI@HLF).
• Integration of an antigravity transport module for directional sweat collection.
• Incorporation of a carbon microyarn sensing array for biomarker analysis and a PCB for data processing.
• Utilizing a patterned adhesive film for universal textile immobilization.

Main Results:

• The SI@HLF system demonstrated effective on-body, dynamic, and multiplexed sweat monitoring.
• Performance was validated in healthy subjects during simulated exercise.
• The system showed utility across various textile types and regions during routine activities.

Conclusions:

• The developed SI@HLF represents a significant advancement in adaptable wearable sweat sensing technology.
• This novel approach offers enhanced flexibility for real-time sweat monitoring in diverse daily scenarios.
• The stick-to-textile design broadens the application scope of WTSSs beyond fixed textile integrations.