My main research is electrospinning of PVDF as piezoelectric sensors. According to the description in papers, I "Used PI/PET film as the substrate, pasted conductive tape as one side electrode, connected the external wire, added PVDF film, and then pasted the conductive tape on top of the PVDF film as the other side electrode, connected the external wire, and finally used PDMS glue for packaging". But I replaced the PVDF fiber with other non-piezoelectric polymers such as PAN, TPU, etc. The PAN sensor obtained by this preparation method can also detect electrical signals under deformation. At the beginning, I thought it might be the reason of the conductive glue, so I used silver glue instead of the conductive tape as the electrode, but the sensor made of PVDF and PAN fiber film can still have electrical signals under deformation, which cannot reflect the piezoelectric characteristics of PVDF.
So I come here for more detailed information about preparing the PVDF Piezoelectric Sensor, such as what is the best material or method to prepare the electrode, how to reduce the air between different layers of the sensor.
Thank you very much!
Fiber film can be easily penetrated by the substrate on top of the film cause it is a porous material.
I recommend using the thicker fiber film and compress it using the hydraulic press or at least a laminator it will fill the gap between fibers and makes it more of a dielectric film.
And don't forget the edge of the piezoelectric film. It is easy to forget the electric path near the edge.
hope it works well
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