Ionic Polymer Sensors with High Stability and Fast Preparation Process Based on Spraying Coating and Ionic Liquid...

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Ionic polymer sensors (IPS) mimic human skin topology via ion migration, enabling medical monitoring and electronic skin applications.
• Traditional piezoelectric IPS face challenges including slow chemical preparation and electrolyte solvent volatilization.

Purpose of the Study:

• To develop a rapid and stable fabrication method for piezoelectric ionic polymer sensors.
• To enhance the environmental and long-term stability of IPS for practical applications.

Main Methods:

• Integrated spraying and gold electrodeposition for rapid IPS fabrication.
• Utilized heating in ionic liquid solution to improve sensor stability.
• Evaluated sensor performance against traditional Na+-based IPS.

Main Results:

• Achieved a 1531% decrease in humidity sensitivity, enhancing environmental stability.
• Demonstrated no signal decay over 12 days due to electrolyte volatilization, confirming long-term stability.
• Successfully integrated IPS into a wearable glove for gesture recognition, pulse measurement, and grip force monitoring.

Conclusions:

• The novel fabrication method offers a fast and effective route to highly stable piezoelectric ionic polymer sensors.
• The enhanced IPS exhibit significant improvements in environmental and long-term stability.
• The developed sensors show strong potential for advanced wearable sensing applications.