A novel electrical depercolation model for stretchable nanocomposite strain sensors

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Flexible strain sensors are crucial for advanced applications, but rigid sensors have limitations.
• Stretchable sensors require effective calibration for reliable performance across their operating range.

Purpose of the Study:

• To present a new model for calibrating resistive-type, stretchable polymer nanocomposite strain sensors.
• To enable accurate calibration over the full conducting strain range of these materials.

Main Methods:

• Development of a novel piezoresistive response model for stretchable nanocomposite strain sensors.
• Application and validation of the model against experimental data from silicone rubber (SR) nanocomposites with reduced graphene oxide (rGO).

Main Results:

• The new model successfully facilitates calibration of SR/rGO nanocomposite strain sensors across their entire conducting strain range.
• The model's predictions align with experimental measurements for various filler loadings.
• Analysis of filler dimensions, orientation, and dispersion effects on sensor performance.

Conclusions:

• The proposed model significantly improves the practical working range and sensing performance of soft conductive nanocomposite strain sensors.
• Key insights into material parameters influencing sensor sensitivity and working range were obtained.
• This work advances the development of high-performance flexible strain sensing technologies.