Effect of electrophoretic deposition kinetic behavior on dielectric property of epoxy coatings under different n-methylethanolamine’s volumes

Lau, Kok Tee and Mohd Halim, Nurhaliana Shazwani and Romzei, Norshazlina and Siva Kumar, Monisha Vani and Tau Len Yong, Kelly and Al-Amani, Umar and You, Ah Heng (2025) Effect of electrophoretic deposition kinetic behavior on dielectric property of epoxy coatings under different n-methylethanolamine’s volumes. Malaysian Journal of Analytical Sciences, 29 (1). pp. 1-11. ISSN 1394-2506

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Abstract

This study investigates the influence of the electrophoretic deposition current–time profile on the dielectric properties of diglycidyl ether of bisphenol A (DGEBA) epoxy coatings applied via electrophoretic deposition (EPD) under varying volumes of N-methylethanolamine (MEA). Three cationic DGEBA suspensions were synthesised by mixing commercially available DGEBA with different volumes of MEA (0.5, 1.0, and 1.5 ml) as the cationisation agent. The EPD processes using these suspensions were monitored by recording the electric current versus deposition time profiles. After curing, the deposited coatings were characterised using electrochemical impedance spectroscopy, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy analysis. The results demonstrate that varying MEA volumes lead to distinct electric deposition current–time profiles, subsequently affecting the coating thickness and dielectric properties. The smooth exponential decay of the electric deposition current–time profile observed during EPD with the 0.5 ml MEA suspension resulted in a high coating thickness and enhanced dielectric properties. Understanding the impact of the electric deposition current–time profile on epoxy coatings deposited via EPD offers an initial quality screening tool to identify poor-quality epoxy coatings with low dielectric properties.

Item Type:	Article
Uncontrolled Keywords:	Electrophoretic deposition, Dielectric property, Epoxy resin, Functionalization, Secondary amine
Divisions:	Faculty Of Industrial And Manufacturing Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	23 Feb 2026 04:46
Last Modified:	23 Feb 2026 04:46
URI:	http://eprints.utem.edu.my/id/eprint/29562
Statistic Details:	View Download Statistic

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