Evaluation of prototype piezoelectret made of foamed butyl rubber and fluorinated ethylene propylene film
Yoshikazu Tanaka, Takayuki Yokobe, Shunta Sasaki, Ryo Yotsumoto, Ryuichi KatoBackground
Sensors use functional materials such as piezoelectrics. Research on functional materials is thus important.
Objective
In the present study, we fabricated a piezoelectret made of foamed butyl rubber and FEP films, and examined its power generation characteristics. A piezoelectret made of butyl rubber was also fabricated for comparison.
Methods
The surface potential was measured as a characteristic parameter. To measure the voltage generated in the test specimen, an experiment was conducted in which an impulsive and cyclic compressive load was applied to the test specimen using a shaker. The piezoelectric stress constant
Results
The surface potential after 2 weeks for the piezoelectrets made of foamed butyl rubber was −0.493 kV and that for the piezoelectrets made of butyl rubber was lower at −0.166 kV. The
Conclusions
A piezoelectret made of foamed butyl rubber was fabricated and evaluated. It is suggested that the voids inside the butyl rubber have a positive effect on the power generation performance.