A Breathable, Low-Cost, and Highly Stretchable Medical-Textile Strain Sensor for Human Motion and Plant Growth...

Area of Science:

• Biomedical Engineering
• Materials Science
• Wearable Technology

Background:

• Flexible strain sensors are crucial for wearable electronics and biological monitoring.
• Existing sensors often use non-breathable materials, hindering physiological integration.
• There is a need for cost-effective, breathable sensors compatible with biological tissues.

Purpose of the Study:

• To develop a low-cost, breathable, and highly stretchable strain sensor.
• To demonstrate its application in human joint motion monitoring and plant growth detection.
• To provide a scalable alternative to complex strain sensing platforms.

Main Methods:

• Constructed a sensor using a double-layer medical elastic bandage as a porous substrate.
• Impregnated a conductive medical elastic tape with carbon nanotubes (CNTs) ink for the sensing layer.
• Utilized hierarchical textile porosity and a deformable CNTs percolation network.

Main Results:

• Achieved a wide strain range of 100% with a gauge factor up to 2.72.
• Demonstrated excellent nonlinear second-order fitting (R² = 0.997).
• The breathable substrate ensured long-term attachment without obstructing gas and moisture exchange.

Conclusions:

• The developed sensor is a simple, low-cost, and effective alternative for strain sensing.
• Its breathability and biocompatibility are advantageous for wearable applications.
• Offers a scalable route for multifunctional wearable sensing platforms for humans and plants.