PVDF NANOFIBROUS MEMBRANE WITH HIGH RATIO OF β-PHASE, PIEZOELECTRIC AND FERROELECTRIC PROPERTIES, AND MANUFACTURING METHOD OF THE SAME

摘要

PURPOSE: A PVDF (polyvinylidene fluoride) nanofiber film and a manufacturing method thereof are provided to express excellent mechanical actuation based on high content of beta crystalline, 60 mC/m^2 of remnant polarization and piezoelectricity. CONSTITUTION: A nanofiber film includes polyvinylidene fluoride(PVDF) and carbon nanotube. In the nanofiber film, the PDVF and carbon nanotube are electrically emitted. The nanofiber film is manufactured by one or more of drawing and poling. The content of the carbon nanotube is 0.01-1.0 wt% based on the weight of the PVDF. The carbon nanotube is multi-walled carbon nanotube(MWCNT). The carbon nanotube is manufactured by introducing carboxylic acid group by one or more methods selected from a group consisting of heat treatment, acid treatment and ultrasonication.