Highly Stretchable Strain Sensors Using an Electrospun Polyurethane Nanofiber/Graphene Composite.

Area of Science:

• Materials Science
• Nanotechnology
• Electrical Engineering

Background:

• Development of flexible and stretchable electronic devices is crucial for advanced applications.
• Graphene-based materials offer unique electrical and mechanical properties for sensor fabrication.
• Polyurethane nanofibers provide a flexible and robust substrate for nanocomposite materials.

Purpose of the Study:

• To fabricate a highly flexible and stretchable strain sensor.
• To investigate the electrical properties and stability of the sensor under varying tensile strains.
• To explore the potential applications of the sensor in human-motion detection.

Main Methods:

• Coating electrospun polyurethane nanofiber mats with chemically reduced graphene oxide.
• Characterization of the morphology and stability of the resulting nanocomposite mats.
• Testing the electrical behavior and strain sensing performance of the fabricated sensor.

Main Results:

• The strain sensor exhibited consistent ohmic behavior across all applied strain levels.
• A monotonic increase in current was observed with increasing tensile strain.
• The fabricated sensor demonstrated excellent stability and electrical properties.

Conclusions:

• A cost-effective and simple method for fabricating graphene-based stretchable electronic devices and strain sensors was established.
• The developed sensor shows significant potential for practical applications, particularly in efficient human-motion detection.
• The combination of graphene oxide and electrospun polyurethane nanofibers yields a promising material for flexible electronics.