Electrodes were connected to exposed BaTiO3–PVDF fibers using 25-gauge needles (BD, Franklin Lakes, NJ), placed into both ends of the sample to a depth of 10 mm. These electrodes were connected to a nano-voltmeter (34420A, Agilent, Cupertino, CA) for piezoelectrically generated voltage detection. The collected data were sent to a custom LabVIEW virtual instrument. The entire testing system was kept in a quiescent state for 300 s to stabilize the system before initiating beam deflections of 6 mm for the tested samples. The measurement of the voltage generation showed good reproducibility. The piezoelectrically generated voltage was also measured for a PDMS-coated/BaTiO3–PVDF fibrous bundle (with 16 wt% BaTiO3) as a function of time during periodic deflection testing. In the cyclic deflection tests, a deflection of 6 mm was generated by a stepper motor at a rate of 0.007 Hz. To maximize the output of the generated voltage signal, the sample was poled at 8 V for 1 h prior to the test.
Electrodes were connected to exposed BaTiO3–PVDF fibers using 25-gauge needles (BD, Franklin Lakes, NJ), placed into both ends of the sample to a depth of 10 mm. These electrodes were connected to a nano-voltmeter (34420A, Agilent, Cupertino, CA) for piezoelectrically generated voltage detection. The collected data were sent to a custom LabVIEW virtual instrument. The entire testing system was kept in a quiescent state for 300 s to stabilize the system before initiating beam deflections of 6 mm for the tested samples. The measurement of the voltage generation showed good reproducibility. The piezoelectrically generated voltage was also measured for a PDMS-coated/BaTiO3–PVDF fibrous bundle (with 16 wt% BaTiO3) as a function of time during periodic deflection testing. In the cyclic deflection tests, a deflection of 6 mm was generated by a stepper motor at a rate of 0.007 Hz. To maximize the output of the generated voltage signal, the sample was poled at 8 V for 1 h prior to the test.
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