Preparation and anticorrosive properties of hybrid coatings based on epoxy‐silica hybrid materials

Abstract

A series of sol-gel derived organic-inorganic hybrid coatings consisting of organic epoxy resin and inorganic silica were successfully synthesized through sol-gel approach by using 3-glycidoxypropyl-trimethoxysilane as coupling agent. Transparent organicinorganic hybrid sol-gel coatings with different contents of silica were always achieved. The hybrid sol-gel coatings with low silica loading on cold-rolled steel coupons were found much superior improvement in anticorrosion efficiently. The as-synthesized hybrid sol-gel materials were characterized by Fourier-transformation infrared spectroscopy, 29 Si-nuclear magnetic resonance spectroscopy and transmission electron microscopy. Effects of the material composition of epoxy resins along with hybrid materials on the thermal stability, Viscoelasticity properties and surface morphology were also studied, respectively.

The Corrosion Protection Performance of the Polyurethane Coatings Containing Surface Modified Fe2O3Nanoparticles

“…[1][2][3][4][5] The enhanced corrosion protection properties of coatings containing nanoparticles have been attributed to their increased barrier properties, as the reinforcing particles/filler provide a more tortuous path for corrosive agents. 6 Nanoparticles have a high specific surface area and surface energy, the combination of which results in an increased tendency to interact with each other and form aggregates and agglomerates.…”

Controversial effects of fumed silica on the curing and thermomechanical properties of epoxy composites

“…Consequently, the required nanoparticle contents in polymer matrices are usually much lower as compared to micro-fillers [6]. The formation of organic-inorganic nanocomposites has shown the ability to provide simultaneous improvements in several properties including thermal stability, glass transition temperature levelling, dimensional stability, flame retardance, dielectric constant lowering and gas barrier and corrosion protection [6][7][8][9][10][11][12][13][14][15]. The degree of interaction between filler and polymer and thus the composite properties have been related to the filler-matrix interface.…”

Polymer nanocomposite coatings

“…Apart from clay, another important material with this advantage is SiO 2 . The incorporation of low-cost SiO 2 nanoparticles into polymers can signifi cantly improve thermal properties, 39,40 mechanical properties, 41,42 anticorrosion, 43,44 wear resistance, 45,46 barrier properties 46,47 and the customization of electronic packaging properties. 48 Nanoparticles can signifi cantly alter the mechanical properties of the polymer close to the particle surface due to changes in polymer chain mobility.…”