Waterborne reduced graphene oxide dispersed bio-polyesteramide nanocomposites: an approach towards eco-friendly anticorrosive coatings

Abstract

RGO dispersed waterborne soy polyester amide nanocomposites were formulated utilizing a solventless VOC free green approach for use as low cost anticorrosive coatings.

Mechanically Strong, Hydrophobic, Antimicrobial, and Corrosion Protective Polyesteramide Nanocomposite Coatings from Leucaena leucocephala Oil: A Sustainable Resource

“…Spectral Analysis. FTIR, 1 H NMR, and 13 C NMR spectra of HELuA and LMPEA confirmed the formation of PEA resin. The important absorption bands and peak values have been mentioned below.…”

“…The bare MS panel is very prone toward corrosion, and the rate of corrosion increases in the presence of chloride ions. The application of LMPEA and LMPEA/Ag nanocomposite coatings offers effective corrosion protection to the MS substrate by forming a good protective layer that separates metal surface from corrosive environments and also due to a tortuous pathway provided to water molecules by the presence of a nanofiller . A higher water contact angle value for nanocomposite coating suggests that the coating has good hydrophobicity rendered by the inclusion of nanofiller, which renders efficient barrier property to the coating surface to hinder the diffusion of corrosive electrolytes, thus conferring superior corrosion resistance .…”

“…It also enhances corrosion resistance performance of coatings in different corrosive media by providing a tortuous path to corrodents as well as enhancing hydrophobicity of coatings. While hydrophilic surfaces attract water molecules and provide easy passage of corrosive media, hydrophobic surfaces act as a barrier, not allowing access to corrosive ions. , Thus, to overcome these drawbacks, in this manuscript, we report the synthesis of PEA from LLO [LMPEA], without using any solvent, and PEA coatings obtained therefrom have been reinforced with silver nanoparticles [SNPs], biosynthesized using LLE. LLO-based PEA was obtained by esterification reaction between LLO-derived amide diol, prepared by sodium methoxide-catalyzed amidation reaction of LLO, and maleic anhydride.…”

Recent Studies on Dispersion of Graphene–Polymer Composites

“…Waterborne graphene dispersions with lignin–OH is reported that this lignin–OH on graphene surface enhances the anticorrosive properties [ 199 ]. rGO has been dispersed in waterborne polyesteramide and used as an anti-corrosive coating material for carbon steel strips [ 200 ]. Graphene modified with 1,10-phenanthroline-5-amine helps to detect the corrosion of the steel at an early stage by forming a red complex with Fe 2+ [ 201 ].…”

Taking Advantage of Phosphate Functionalized Waterborne Acrylic Binders to Get Rid of Inhibitors in Direct-to-Metal Paints

“…Nevertheless, barrier properties provided by a binder are not able to provide full corrosion protection to a coating, and hence the anticorrosion performance is markedly improved when anticorrosion pigments, inhibitors or additives are included in the paint formulation or in the binder itself. In this sense, recently, waterborne polymer dispersions (acrylic, epoxy, polyurethanes, and hybrids systems) have been modified by including in the dispersions boron nitride nanoparticles/nanosheets [18][19][20][21], graphene oxide [22][23][24], polyaniline nanoparticles [25][26][27], nanoferrite [28], and carbon nanotubes [29] among others. In addition to that, for a long lasting and efficient corrosion protection of the coated material, the metal substrate is usually chemically pretreated to provide enhanced corrosion protection as well as to increase its adhesion to the organic coating.…”