Polyorthotoluidine dispersed castor oil polyurethane anticorrosive nanocomposite coatings

Abstract

Conducting polymer (polyorthotoluidine) dispersed castor oil polyurethane nanocomposite coatings were synthesized and show a remarkably higher corrosion resistant performance in alkaline medium.

Synthesis and properties of polyurethane elastomers based on renewable castor oil polyols

“…In the last few years, castor oil has been used widely to prepare polyurethane products, including rigid foams, flexible foams, elastomers, coatings, and adhesives . As castor oil and its derived polyols bear long hydrophobic hydrocarbon chains, they can increase the hydrophobicity of soft segment (SS) and enhance the water resistance of the as‐prepared polyurethane products.…”

“…Polyurethanes, produced by the reaction of a diol (or polyol) with a diisocyanate (or polyisocyanate), are one of the major kinds of commercial polymers with very wide applications. [1][2][3] Recently, environmentally friendly polyurethanes are gaining increasing attention in both academic and industrial communities, because of depletion and fluctuating prices of fossil resources, environmental issues, and health problems. [4][5][6] Vegetable oils (VOs), natural triglycerides, have been growing up as one of the important renewable resources as building block of polyurethanes.…”

“…7,16 Fortunately, natural castor oil has three secondary hydroxyl groups in molecule and can be used directly to prepare polyurethanes. 17 In the last few years, castor oil has been used widely to prepare polyurethane products, including rigid foams, [18][19][20] flexible foams, 21,22 elastomers, 8,9 coatings, 3,23 and adhesives. [24][25][26] As castor oil and its derived polyols bear long hydrophobic hydrocarbon chains, they can increase the hydrophobicity of soft segment (SS) and enhance the water resistance of the as-prepared polyurethane products.…”

Conducting poly(o-anisidine-co-o-phenyldiammine) nanorod dispersed epoxy composite coatings: synthesis, characterization and corrosion protective performance

“…2), of 2.0% P (oA-co-oPDA)-epoxy showed OH stretching vibration peak at 3,460 cm -1 broader in wavelength, which shifted by 14 cm -1 as compared to epoxy matrix. The NH stretching vibration band of P (oA-co-oPDA) overlaps the OH stretching vibration which revealed the electrostatic interaction of NH group of P (oA-co-oPDA) and OH group of epoxy via strong hydrogen bonding 21,22 . The benzenoid and quinoid vibration peaks were very intense and pronounced indicating the strong interaction between P(oA-co-oPDA) and epoxy.…”

Experimental and DFT studies of porous carbon covalently functionalized by polyaniline as a corrosion inhibition barrier on nickel-based alloys in acidic media

“…5 Ahmad and Kashifa reported corrosion inhibition in 3.5% HCl medium of mild steel coated by poly-ortho-toluedine nanoparticles loaded polyurethane and castor oil-polyurethane composite. 6 The bare mild steel corroded as compared with composite coated mild steel because protective inhibitor lm was not formed on the mild steel surface.…”