Comparative study of polyaniline and poly(1‐naphthylamine) dispersed oil polyurethane coatings

Abstract

Purpose -The purpose of this paper is to report a comparative study of conducting polymer (CP) dispersed oil polyurethane coatings derived from a sustainable resource, i.e. polyaniline (PANI)/coconut oil polyesteramide urethane (CPEAU) and poly(1-naphthylamine) (PNA)/linseed oil polyurethane (LPUA) coatings. Design/methodology/approach -The coatings were prepared chemically and were characterized for their physico-chemical, physico-mechanical, corrosion protective efficiency, and open circuit potential measurements. The morphological analysis of the corroded carbon steel (CS), coated uncorroded CS, and coated corroded CS specimens, was carried out by SEM analysis. Findings -The study revealed that the presence of a CP enhanced the corrosion protective efficiency of the sustainable resource-based organic coatings. The type of CP used also played a major role in defining the corrosion resistance behavior of the coating materials. Originality/value -The comparative study of anticorrosive properties of CP with oil-based polyurethane blends has been studied for the first time.

Recent progress in the preparation of polyaniline nanostructures and their applications in anticorrosive coatings

“…The advantage of polyurethane coatings is their remarkable resistance to ultraviolet radiation and weather. Compared to epoxy coatings, they are also widely used for corrosion protection, 105,106 especially in an environment where sunlight is abundant, because this type of coating exhibits low loss of gloss and color change when exposed to ultraviolet radiation. 107 Due to good abrasion resistance, hardness, gloss, general chemical resistance, and impact resistance coupled with zero or low volatile organic compound (VOC) emissions, waterborne polyurethane dispersions are widely investigated.…”

Nonedible Vegetable Oil-Based Polyols in Anticorrosive and Antimicrobial Polyurethane Coatings

“…Poly(urethane fatty amide) (PUFA) showed better coating performance in terms of gloss, bending, chemical resistance, impact resistance, scratch resistance, and thermal resistance. Ahmad et al, reported LO-based PUFA composite with conducting polymer, poly(1-naphthylamine) [ 113 ]. The dense and continuous structure of the tested coatings was consistent with their ability to protect the metal substrate from corrosion.…”

“…The dense and continuous structure of the tested coatings was consistent with their ability to protect the metal substrate from corrosion. The PUFA matrix functioned as a barrier coating and prevented the penetration of aggressive ions, while the conducting polymer reacted with the substrate to form a passive oxide layer [ 113 ]. NO fatty amide-based PU coatings showed good anticorrosive performance due to the excellent adhesion of the coatings with a metal substrate [ 119 ].…”