A Facile Strategy for Textile-Based Highly Sensitive and Water-Resistant Triboelectric Nanogenerator

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Real-time physiological monitoring demands advanced sensor technologies.
• Existing triboelectric nanogenerators (TENGs) face challenges in manufacturing complexity, sensitivity, and humidity resistance.
• Fabric-based TENGs (F-TENGs) are explored to overcome these limitations.

Purpose of the Study:

• To develop a simplified, humidity-resistant F-TENG for enhanced physiological monitoring.
• To investigate the impact of micro-filament structure and 3D architecture on device performance.
• To evaluate the F-TENG's potential for detecting subtle physiological signals and its antibacterial properties.

Main Methods:

• Fabrication of an F-TENG using waterborne polyurethane (WPU) and polypyrrole (PPy).
• Characterization of the F-TENG's micro-filament structure and 3D architecture.
• Testing of voltage output during carotid artery and respiratory monitoring.
• Assessment of performance stability under varying relative humidity conditions.
• In vivo testing of the F-TENG implanted in a rat model.

Main Results:

• The F-TENG utilizes WPU and PPy, simplifying fabrication and enhancing environmental resistance.
• The micro-filament and 3D architecture improve sensitivity to weak physiological signals.
• Stable voltage output was achieved during carotid and respiratory monitoring.
• The F-TENG retained 78.78% of its output voltage under high humidity (20% to 80% RH).
• An output of 21 V was recorded in a rat's leg, demonstrating in vivo functionality and antibacterial properties.

Conclusions:

• The developed F-TENG presents a robust and versatile platform for dynamic physiological monitoring.
• Its simplified design, humidity resistance, and sensitivity make it suitable for wearable electronics.
• The F-TENG shows significant potential for integrated diagnostic and therapeutic systems.