Uniaxially drawn poly (L-lactic acid)/ poly (vinylidene fluoride) polymer blend as a promising piezoelectric material: Hysteresis and resonance spectroscopy study
Document Type
Article
Publication Date
9-1-2024
Abstract
This study explores the potential for piezoelectricity in a blend of polyvinylidene fluoride (PVDF) and poly-Llactic acid (PLLA) prepared using the solution casting method. Dielectric frequency measurements across a range of 102 to 106 Hz revealed piezoelectric resonance within a broader dielectric relaxation regime. Analysis of the resonance spectra for length and width vibrational modes enabled the determination of the piezoelectric tensor components of the PVDF/PLLA blend. The blend exhibited enhanced ferroelectric polarization reversal, remnant polarization, and coercive field compared to pristine PVDF samples. The piezoelectric constants d31 and d14 (d36 of the blend) were determined. Mechanical drawing and poling techniques were employed to generate multiple piezoelectric constants, allowing for efficient energy harvesting from various directions. This flexible blend offers promising prospects for versatile energy conversion applications.
Keywords
Piezoelectric polymer, PVDF/PLLA, Energy harvesting
Divisions
PHYSICS
Funders
Universiti Malaya (UM.C/625/1/HIR/166) ; (PG090-2104A)
Publication Title
Journal of Molecular Structure
Volume
1311
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS