Dielectric Coating of Castor-Oil-Based Polyurethane Modified with Leucoemeralidine Polyaniline

Abstract

Dielectric composite coatings were prepared from the castor-oil-based polyurethane (PU) resin with incorporation of leucoemeralidine polyaniline (LB-PANI) nanofiber into resin for electrical insulation purposes. The LB-PANI nanofibers were synthesized via chemical oxidation polymerization of aniline with acetic acid and ammonium peroxydisulfate. The LB-PANI was characterized by FTIR spectroscopy. The castor-oil-based polyurethane nanocomposite films of LB-PANI nanofiber in the range of 80–90 micrometer thickness were obtained by spin coating. It was found that dielectric properties like resistivity and breakdown voltage (BDV) of fabricated castor-oil-based polyurethane coating improved significantly with increase in LB-PANI content in the coating.

Keywords:

• Breakdown voltage
• castor oil
• electrical insulation
• polyurethane

Acknowledgment

This work was supported financially by the University Grant Commission (UGC) Government of India. Parag A. Wasekar gratefully acknowledges UGC for the research fellowship in engineering and technology.