Design of Highly Adhesive and Water-Resistant UV/Heat Dual-Curable Epoxy–Acrylate Composite for Narrow Bezel Display Based on Reactive Organic–Inorganic Hybrid Nanoparticles

Abstract

To attain the narrow bezel characteristic of information displays, functional sealing composite materials should possess high adhesion strength and water barrier performance due to their narrow line widths. In this study, highly adhesive UV/heat dual-curable epoxy–acrylate composites with outstanding water-resistant performance have been proposed using photoreactive organic–inorganic hybrid nanoparticles that can react with an acrylate resin, creating a crosslinked nanoparticle network within the sealing composite. The hybrid nanoparticles consisted of reactive methacrylate groups as a shell and an inorganic core of silica or aluminum oxide, and were facilely synthesized through sol–gel reaction and chemisorption process. The curing characteristics, adhesive strength, and moisture permeability of the proposed sealing composite have been compared to those of a conventional epoxy–acrylate composite containing inorganic silica particles. The composites including hybrid nanoparticles exhibited high UV and heat curing ratios owing to the numerous methacrylate groups on the nanoparticle surface and high compatibility with organic resins. Moreover, the proposed sealing composite showed high adhesion strength and extremely low water permeability due to the creation of densely photocrosslinked network with matrix resins. In addition, the sealing composite exhibited excellent narrow dispensing width as well as relatively low viscosity, suggesting the potential application in narrow bezel display.

Epoxy-Based Structural Self-Adhesive Tapes Modified with Acrylic Syrups Prepared via a Free Radical Photopolymerization Process

“…Acrylate copolymers can be incorporated into ERs in the form of hybrid nanoparticles consisting of an inorganic core (silica or aluminum oxide) and a reactive methacrylate-based shell. A UV/heat dual-curable epoxy–acrylate adhesive containing the mentioned core-shell particles exhibits outstanding water resistance [ 15 ]. Applications of epoxyacrylate copolymers (based on BA, GMA, and 2-hydroxyethyl acrylate) prepared by a conventional radical polymerization process in an organic solvent [ 16 , 17 , 18 , 19 ] or by bulk photopolymerization [ 20 ] are also known.…”

Renewable UV-curable polyester methacrylate/cellulose nanocrystals composite resin for wood waterproof coating

“…High humidity environments are often encountered in industrial applications, which requires the use of coating systems with high mechanical and waterproof properties [13]. The concept of improving the performance of coating systems via using nano scale materials has been promising [14][15][16]. Nowadays there is a greater interest in using CNCs for the development of nanocomposites [17][18][19][20].…”