Highly Aligned Bacteria Cellulose Yarn Aggregation for Energy Generation and Strain Sensing

Area of Science:

• Materials Science
• Biotechnology
• Wearable Electronics

Background:

• Bacterial cellulose (BC) offers sustainable and functional material properties for wearable electronics.
• Fabricating self-powered, highly mechanosensitive stretchable BC sensors is challenging due to interface and conductivity issues.

Purpose of the Study:

• To develop an innovative bio-fabrication strategy for creating high-performance, multi-functional bio-based sensors.
• To integrate strain sensing and energy self-sufficiency in a single wearable device.

Main Methods:

• A bio-fabrication strategy inspired by biological spiral construction was employed to create a core-sheath yarn.
• The yarn integrates triboelectric and resistive responses, featuring an ordered network and mechanosensitive twisting structures.
• Scalable self-powered fabrics were developed for energy generation and storage to power the sensing system.

Main Results:

• The yarn sensor demonstrated a sensitive mechanosensitive response (8.246) and a wide strain range (up to 100%).
• High voltage signals exceeding 50 V were achieved, indicating efficient energy harvesting.
• The developed fabrics enabled continuous health monitoring through self-powered operation.

Conclusions:

• The novel core-sheath yarn design effectively combines strain sensing and energy self-sufficiency.
• This bio-manufacturing approach paves the way for advanced, multi-functional bio-based wearable sensors.
• The integrated system supports continuous health monitoring via self-powered wearable fabrics.