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Updated: Sep 24, 2025
Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
Published on: March 24, 2023
Flexible electrospun PVDF-BaTiO3 hybrid structure pressure sensor with enhanced efficiency.
Sahar Kalani1, Reza Kohandani2, Roohollah Bagherzadeh1,3,4
1Advanced Fibrous Materials LAB, Institute for Advanced Textile Materials and Technologies (ATMT), School of Advanced Materials and Processes, Amirkabir University of Technology Tehran Iran Bagherzadeh_r@aut.ac.ir.
Researchers developed advanced ceramic-polymer composites for enhanced flexible pressure sensors. Introducing barium titanate (Ba-TiO3) nanoparticles into polyvinylidene fluoride (PVDF) nanofibers significantly boosts sensitivity for wearable electronics.
Area of Science:
- Advanced Materials Science
- Nanotechnology
- Polymer Science
Background:
- Organic and inorganic hybrid structures are emerging as key materials for flexible and stretchable sensors and actuators.
- Ceramic-doped polymers offer unique properties for advanced electronic applications.
- Polyvinylidene fluoride (PVDF) is a well-known piezoelectric polymer.
Purpose of the Study:
- To enhance the pressure sensitivity of polyvinylidene fluoride (PVDF) using ceramic doping.
- To fabricate flexible and stretchable multilayered pressure sensors.
- To investigate the effect of barium titanate (Ba-TiO3) nanoparticles on PVDF nanofibers.
Main Methods:
- Solution casting technique for preparing uniform ceramic-polymer composites.
- Electrospinning of nanocomposite fibers.
- Fabrication of multilayered pressure sensors.
- Characterization of piezoelectricity and pressure sensitivity.
Main Results:
- Uniform tetragonal Ba-TiO3 and PVDF composites were successfully prepared.
- Introduction of Ba-TiO3 nanoparticles into PVDF nanofibers significantly improved piezoelectricity and pressure sensitivity.
- The developed flexible and stretchable multilayered pressure sensor exhibited high electrical sensitivity (6 mV N⁻¹).
- The sensor's sensitivity was substantially higher than pure PVDF sensors (1.88 mV N⁻¹).
Conclusions:
- The study demonstrates a composition-dependent approach for fabricating nanostructures for pressure sensors.
- The developed Ba-TiO3/PVDF nanocomposite fibers show great potential for wearable devices.
- This work advances the field of flexible and stretchable electronic sensors.
