Curing of Functionalized Superhydrophobic Inorganic/Epoxy Nanocomposite and Application as Coatings for Steel

Abstract

Superhydrophobic epoxy nanocomposites coatings with superior mechanical and adhesion strength are targeted to increase epoxy coating performance and to protect steel corrosion in aggressive environment. The present work prepared hydrophobic organic modified inorganic nanoparticles (NPs) based on magnetite, titanium dioxide and silver capped with epoxide oleic, linoleic and linolenic fatty acids. Their chemical structures, thermal stability, crystalline lattice structure, morphology and particles sizes distribution were determined using different tools. The curing exothermic reactions and thermal mechanical properties of the cured commercial epoxy with polyamine hardener were evaluated in the presence of the modified NPs to investigate their effect on the curing mechanism and crosslinking densities of the cured epoxy networks. The adhesion strength, abrasion resistance, seawater contact angles and seawater salt spray resistances of the cured epoxy coatings were evaluated on the steel surfaces. The obtained results confirm that the increasing weight contents of the modified NPs embedded into epoxy networks via chemical linking affect the adhesion, superhydrophobicity and anticorrosion performances of the cured epoxy coatings on the steel surfaces.

New Epoxy and Hardener System Based on an Imidazolium Ionic Liquid as an Anticorrosive Coating for Steel in the Marine Environment

“…The traditional route to prepare epoxy resins bearing glycidyl groups was used to prepare cationic and anionic glycidyl salt epoxy IL monomers. The presence of ILs in the chemical structures of the cured epoxy networks improved the tribiological performance, antimicrobial activity, superhydrophobicity, and self-healing of the cured epoxy-amine IL system as anticorrosive organic coatings. In this respect, the present work aims to prepare a polyfunctional epoxy resin and hardener from imidazolium cationic ILs to modify their thermomechanical, toughness, and anticorrosion characteristics after curing to apply as new epoxy organic coatings for steel.…”

The Influence of Battery Acid on the Destruction of Acrylic Coatings of Car Bodies

“…It should be stressed that information resources in the area of the physico-chemical properties of protective-decorative polymer coatings, constituting the basis for their operational life increase, are continually updated by numerous researchers dealing with this subject [25][26][27][28][29][30][31][32][33][34][35][36][37]. This growing interest in the subject is the result of the growing requirements in regard to the reduction of the contents of volatile organic compounds (VOC), according to directive 2006/42/WE of the European Parliament and The Council.…”

“…The introduction of special substances into the nanocontainers enables one to control final properties of the coatings. In this way, it is possible to obtain smart coatings that are antibacterial, antifouling, self-cleaning, anti-icing, colour-altering, or hydrophobic [22,26,30,35].…”