Scratch- and wear-resistant photoluminescent silicone epoxy coatings on floor tiles

Abstract

Photoluminescent silicone epoxy resins were prepared by physical dispersion of SrAl<inf>2</inf>O<inf>4</inf>:Eu²⁺, Dy³⁺ pigments. The resin was deposited on ceramic tiles for flooring by automatic drawdown and left to harden at ambient conditions. Morphology of the coated tiles was measured by contact gage profilometry and field emission gun scanning electron microscopy. Mechanical response was investigated by pencil and cross-hatch scratch tests; depth-sensing indentation measurements were performed using Vickers and flat punch indenters. Tribological response of the coated tiles was measured by progressive and constant load scratch tests and dry sliding linearly reciprocating ball-on-flat tests, respectively. Intensity of photoluminescent radiations and the corresponding decay time were estimated by digital imaging. The photoluminescent coatings feature high hardness, scratch and wear endurance as well as good clarity. Being the resin designed for spontaneous drying and suitable for easy-to-automate and versatile deposition processes, it is the ideal candidate for the decoration of a large variety of substrates as well as for the repowering and/or retrofitting of previous installations

Corrosion protection by epoxy/poly(aniline‐co‐pyrrole)/ZnO nanocomposite coating

“…Furthermore, it has been shown that metal oxide nanoparticles such as ZnO and TiO 2 can significantly improve the resistance of coatings and prevent the degradation of paint. [5][6][7] Polyaniline (PA) is one of the most promising conducting polymers, which is widely used for corrosion protection purposes, due to low cost, easy preparation, and good environmental stability. [8][9][10][11][12][13] In recent years, several studies have been carried out to enhance the properties of PA for better corrosion protection.…”

Effect of graphene on the electrochemical protection of zinc‐rich coatings

“…Graphene, as a two‐dimensional sheet of carbon, has being widely studied across a number of areas due to its exceptional micromechanical and thermal properties . Recently, considerable amount of papers have reported that the graphene/polymer composite possesses enhanced barrier properties that are beneficial for high anticorrosion performances . Unlike carbon nanotubes that can only provide similar mechanical benefits, these lightweight sheets can reduce oxygen permeability of host membranes .…”

Photocuring Behaviors of Epoxy Resins using Deep-UV LEDs

“…The photocuring of epoxy resins [1][2][3][4][5][6] has been extensively studied due to the wide applicability, such as negative-type photoresists, coating materials and printing materials, to overcome the oxygen inhibition of the photocuring system using acrylates [1]. We are strongly interested in UV light-emitting diodes (UV LEDs) as the light sources for UVcuring technologies due to their long life, high stability, bright output, compactness, and low power requirement.…”