Work

Dielectric Property of Hexagonal Boron Nitride-Filled Epoxy Coatings Electrophoretically Deposited by Various N-Methylethanolamine-Cationized Epoxy-hBN Baths and EPD Voltages

Year: 2026

Type: article

Abstract: This study explores the dielectric property of hexagonal boron nitride-filled epoxy coatings electrophoretically deposited by various N-Methylethanolamine-cationized epoxy-h-BN baths and EPD voltages. The cationic epoxy suspension was synthesized using diglycidyl ether of bisphenol and MEA as main reactants, followed by mechanical mixing with poly(diallyldimethylammonium chloride)-functionalised h-BN particles. The electrophoretic deposition behaviour (i.e. deposit yield, coating thickness) and the coating’s dielectric constant were investigated by varying MEA volumes (0.5, 1.0, and 1.5 mL) and EPD voltages (30, 40, and 60 V). The coated samples were characterised using field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), and electrochemical impedance spectroscopy (EIS) to evaluate morphology, elemental composition, and dielectric performance. The findings indicate optimal coating properties was achieved using 0.5 mL MEA EPD bath and deposited at 30 V, which shows a balance between deposition yield, uniformity, and dielectric behaviour. The study provides insights into the optimization of EPD-based epoxy-hBN coatings for industrial applications requiring advanced electrical insulation and protective functionalities.

Source: International Journal of Research and Innovation in Social Science

DOI: 10.47772/ijriss.2026.100900059