Piezoelectric sensor based on electrospun poly(vinylidene fluoride)/sulfonated poly(1,4-phenylene sulfide) blend nonwoven fiber mat

摘要

Electrospun poly(vinylidene fluoride) (PVDF)/sulfonated poly(1,4-phenylene sulfide) (sPPS) blend nanofiber webs are prepared to investigate the changes in piezoelectric behavior of PVDF as a function of sPPS content using spectral and electrical measurements. Initial fourier transform infrared (MK) spectral analysis carried out using PVDF/sPPS as-cast films provides useful information about the preferential formation of the beta-crystalline phase in PVDF. Even with the addition of 10 wt of sPPS, beta-crystalline absorbance increases significantly in as-cast PVDF film at the expense of a corresponding decrease in a-crystalline absorbance. Cyclic-voltammetric analysis confirms the redox behavior of sPPS and its influence on improving the performance of PVDF/sPPS blend-based piezoelectric sensor through hydrogen bonding and ion-dipole interactions. The piezoelectric output signal recorded using PVDF/sPPS blend (95:5) nanofiber web shows similar to 4.4 times increase in output signal amplitude compared to that of neat PVDF based sensor, which is an evidence that the PVDF/sPPS nanofiber web material can be used as a commercially viable flexible pressure sensor.