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Three-Dimensional Printed Carbon Black/PDMS Composite Flexible Strain Sensor for Human Motion Monitoring.

Haishan Lian1, Ming Xue2, Kanglin Ma1

  • 1School of Mechanical and Electronic Engineering, Lingnan Normal University, Zhanjiang 524048, China.

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|August 26, 2022
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Summary

Researchers developed a 3D-printed flexible strain sensor using carbon black/silicone elastomer (CB/PDMS) composites. This cost-effective sensor shows high sensitivity for monitoring human motion and facial expressions.

Keywords:
CB/PDMS compositesdirect-write 3D printingmotion monitoringstrain sensors

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Area of Science:

  • Materials Science
  • Engineering
  • Biomedical Engineering

Background:

  • Flexible strain sensors are crucial for soft robotics, wearable devices, and health monitoring.
  • Existing sensors often face challenges with cost, structural complexity, and scalable fabrication.
  • There is a high demand for high-performance, low-cost, and easily manufacturable strain sensors.

Purpose of the Study:

  • To develop a cost-effective, flexible strain sensor using 3D printing.
  • To utilize carbon black/silicone elastomer (CB/PDMS) composites for strain sensing and electrodes.
  • To demonstrate the sensor's capability in monitoring human motion and facial expressions.

Main Methods:

  • A direct-ink-writing-based 3D printing technique was employed for layered fabrication.
  • Carbon black/silicone elastomer (CB/PDMS) composites were synthesized and used as the sensing material.
  • The fabricated sensor's performance was evaluated for sensitivity, stability, and hysteresis.

Main Results:

  • The CB/PDMS composite exhibited a sensitivity of 5.696 within a 0-60% linear strain range.
  • The sensor demonstrated good stability and low hysteresis, indicating reliable performance.
  • The flexible strain sensor successfully monitored various human motions, including large deformations and facial expressions.

Conclusions:

  • Direct-ink-writing 3D printing offers an efficient method for fabricating flexible strain sensors.
  • CB/PDMS composites are effective sensing elements for high-performance, stretchable strain sensors.
  • The developed sensor shows significant potential for applications in human motion tracking and health monitoring.