INFLUENCE OF DISPERSION FORMULATING PROCESS ON SURFACE ROUGHNESS AND MICROSTRUCTURE OF POLY(VINYLIDEN FLUORIDE) FILMS BY ELECTROPHORETIC DEPOSITION

Lau KT , Kok SL, Razak JA and Munawar RF

  • Lau KT

Abstract

INFLUENCE OF DISPERSION FORMULATING PROCESS ON SURFACE ROUGHNESS AND MICROSTRUCTURE OF POLY(VINYLIDEN FLUORIDE) FILMS BY ELECTROPHORETIC DEPOSITION

Lau KT1[*], Kok SL2, Razak JA1 and Munawar RF1

1Faculty of Manufacturing Engineering, 2Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka,

Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia.

 

Piezoelectric poly(vinyliden fluoride) (PVDF) is attractive because of their low cost, lightweight, biocompatibility and superior mechanical flexibility. Electrophoretic deposition (EPD) technique has the capability of conformally deposit PVDF film on uneven surface target. Nevertheless, knowledge of the role of dispersion formulating process is crucial for achieving an even and uniform PVDF film. Sedimentation test showed PVDF polymer dispersions are more stable and well-dispersed in DMF than in MEK media. For MEK-based dispersion, higher stirring temperature produced less stable and more agglomerated PVDF dispersion, whereas longer stirring time reduced the degree of the PVDF polymer agglomeration. More stable DMF-based dispersions produced lower PVDF depositions than the less stable MEK-based dispersions. PVDF dispersions with higher degree of agglomeration produced films with higher surface roughness and porosity feature.

 

Keywords: Piezoelectricity, agglomeration, polymer solubility, stability, sedimentation test

[*] Corresponding author: Tel: +6 06 331 6402

E-mail: ktlau@utem.edu.my

Published
2015-12-31
Section
Original Research Articles