Novel Macromolecular Emulsifiers as Coatings with Water‐Tolerant Antifogging Properties Based on Coumarin‐Containing Copolymeric Micelles

Abstract

An efficient macromolecular emulsifier as water‐tolerant antifogging coating based on coumarin‐containing copolymeric micelles is reported. Compared to the previous work using poly(methyl methacrylate‐co‐2‐(dimethylamino)ethyl methacrylate), coumarin unit in copolymer‐based coating can be photo‐crosslinked under UV light to form an interchain network, successfully avoiding the use of chemical crosslinking agents.

Dual-Functional Emulsifying/Antifogging Coumarin-Containing Polymeric Micelle

“…To elucidate the correlation between the physical surface wettability and antifogging property of the ICN coatings, time-dependent water contact angles (CAs) on these surfaces were monitored over a 10 min period under the ambient conditions (Figure ). The initial CAs for all ICN coatings are 60–70°, analogous to the previous findings (a coating did not have to be superhydrophilic for effective antifogging). ,− All CAs decrease with the increasing time due to water evaporation. After further investigation, the CAs decrease by only 11° on the control glass, while more than 21° on the ICN coatings during the 10 min period.…”

“…While a distinct 35% decrease in light transmittance is observed for ICN-T3, there is about 10% decrease for ICN-T1. The poor antifogging performance of ICN-T3 is likely due to the relatively high AOM content (40 mol %) in the terpolymer T3, which is similar to our recent report 15 (i.e., poor antifogging performance was observed on a polymer coating containing 40 mol % 7-(4-vinylbenzyloxyl)-4-methylcoumarin). These results clearly suggest that the photo-cross-linkable hydrophobic AOM unit plays a crucial role in the antifogging performance.…”

“…A series of strategies have been implemented to mitigate the fogging problems. − However, most of them involve the use of a superhydrophilic coating, which generally requires complicated preparation procedures. New-style antifogging coatings ,− have been recently obtained by flexibly balancing the hydrophilicity and hydrophobicity of the coatings. For example, Ming et al designed and prepared an amphiphilic antifogging coating based on a semi-interpenetrating polymer network comprising either a linear polymer , or a quaternary ammonium compound , and a network of polymerized ethylene glycol dimethacrylate (EGDMA).…”

“…Recently, we developed an interesting and effective antifogging application based on coumarin-containing polymeric micelles. 15 As we all know, fogging or frosting can significantly blur a transparent substrate (e.g., windshields, goggles, lenses, and medical endoscopes) and reduce visibility, causing many inconvenient problems even potential dangers. A series of strategies have been implemented to mitigate the fogging problems.…”

Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends

“…Spin-coating deposition makes it possible to prepare anti-fogging coatings based on semiinterpenetrating polymer networks (SIPNs) with frost-resistance [152] and even anti-bacterial/antiviral activity [153]. For example, Zhao and colleagues [154] prepared SIPNs based on random copolymers of poly(DMAEMA-co-MMA) within a network of UV-cured PEGDMA with antifogging/anti-bacterial features.…”