Highly Stretchable Capacitive Sensor with Printed Carbon Black Electrodes on Barium Titanate Elastomer Composite

Area of Science:

• Materials Science
• Robotics
• Electronics Engineering

Background:

• Wearable electronics and soft robotics increasingly rely on soft, stretchable sensors.
• Developing sensors that maintain performance under significant strain is crucial for these applications.

Purpose of the Study:

• To fabricate a highly stretchable capacitive sensor for advanced wearable and robotic systems.
• To demonstrate the sensor's performance under extreme stretching conditions.

Main Methods:

• Fabrication of an interdigital capacitor using printed carbon black/Ecoflex on a barium titanate⁻Ecoflex composite substrate.
• Testing the sensor's mechanical robustness and electrical performance under cyclic stretching up to 100% strain.

Main Results:

• The capacitive sensor demonstrated high stretchability, enduring strains up to 100%.
• The sensor exhibited excellent robustness, with good repeatability and consistency over 1000 stretching and relaxing cycles.

Conclusions:

• A highly stretchable and durable capacitive sensor has been successfully fabricated.
• The developed sensor is suitable for demanding applications in wearable electronics and soft robotics due to its resilience and consistent performance.