UV-Curable Antismudge Coatings

Abstract

Current antismudge coatings that bear nano-pools of a grafted liquid ingredient for dewetting enablement (NP-GLIDE) are cured at high temperatures, which are undesirable for application on heat-sensitive substrates. Reported herein is the development of a NP-GLIDE coating that can be photocured at room temperature. Of the various formulations that have been tested, robust coatings were obtained from one recipe consisting of a photoinitiator, a trifunctional monomer that bears three double bonds, and a graft copolymer. The last bears pendent double bonds and a poly(dimethylsiloxane) (PDMS) side chain as the antismudge agent. Coatings were prepared by casting films from a solution containing these three components and then photolyzing the resultant films. A systematic study revealed that the liquid sliding property developed on the coating at a lower cross-linking density than that required for ink to contract. Further, retaining the ability to contract ink traces after many writing and erasing cycles was the most demanding of the three antismudge tests. For our optimized formulation, only 5 min of irradiation was required to yield a transparent coating with superior antismudge properties. Moreover, irradiating selected regions and then removing, with a solvent, reagents in the nonirradiated regions can yield a surface with patterned wettability. These advantageous properties of the new photocurable coating facilitate its applications.

Robust Hyperbranched Polyester-Based Anti-Smudge Coatings for Self-Cleaning, Anti-Graffiti, and Chemical Shielding

“…However, high contact angles and clean liquid sliding on the coating surface do not imply that the coating possesses anti-smudge properties because oil-based ink contraction on the coating surface is more challenging. 29 On an insufficiently cross-linked coated surface, except for surface reconstruction, ink exhibited little or insignificant contraction behavior, which resulted in persistent and noticeable markings on the coating surface after wiping. 31 In a hyperbranched polyester-based coating system, high density of hydroxyl groups was heavily cross-linked by HDIT.…”

Biomimetic Brushlike Slippery Coatings with Mechanically Robust, Self-Cleaning, and Icephobic Properties

“…The polydimethylsiloxane (PDMS)-based coatings, − with a low surface energy and a low elastic modulus, provide lower surface adhesion strength. Zhang’s group , had prepared various PDMS-based antifouling coatings with excellent antifouling properties.…”

One-Step Synthesis of Novel Renewable Vegetable Oil-Based Acrylate Prepolymers and Their Application in UV-Curable Coatings

“…Curing coatings by heating at high temperature is often time-consuming, energy-intensive, and not suitable for heat-sensitive substrates [1]. Compared with traditional thermosetting coatings, ultraviolet (UV)-curable coatings have developed rapidly due to their advantages of the "5Es" (Efficient, Environmentally friendly, Energy saving, Enabling, and Economical) [2,3]. The above advantages of UV-curable coatings can be specifically explained as wood had a limited oxygen index (LOI) of 27.52%, which effectively reduced the peak heat release rate and smoke production rate, and the char yield could reach 14.41% [23].…”