On the Durability and Wear Resistance of Transparent Superhydrophobic Coatings

Abstract

Transparent liquid repellent coatings with exceptional wear and abrasion resistance are very demanding to fabricate. The most important reason for this is the fact that majority of the transparent liquid repellent coatings have so far been fabricated by nanoparticle assembly on surfaces in the form of films. These films or coatings demonstrate relatively poor substrate adhesion and rubbing induced wear resistance compared to polymer-based transparent hydrophobic coatings. However, recent advances reported in the literature indicate that considerable progress has now been made towards formulating and applying transparent, hydrophobic and even oleophobic coatings onto various substrates which can withstand certain degree of mechanical abrasion. This is considered to be very promising for anti-graffiti coatings or treatments since they require resistance to wear abrasion. Therefore, this review intends to highlight the state-of-the-art on materials and techniques that are used to fabricate wear resistant liquid repellent transparent coatings so that researchers can assess various aptitudes and limitations related to translating some of these technologies to large scale stain repellent outdoor applications.

Evaluation of Accelerated Ageing Tests for Metallic and Non-Metallic Graffiti Paints Applied to Stone

“…However, despite significant progress, combining transparency with mechanical abrasion, resistance remains very challenging and is not described frequently in the literature. Furthermore, one of the main breakthroughs to achieve is to apply anti-graffiti over large areas commonly encountered for graffiti prevention, i.e., public transport vehicle windows, walls, or building windows, to name a few ( [37], and references therein).…”

From Extremely Water-Repellent Coatings to Passive Icing Protection—Principles, Limitations and Innovative Application Aspects

“…Therefore, the attention of both scientists and funding agencies gradually shifts towards a relatively new concept (intensively explored for about a decade) for passive icing protection, namely using superhydrophobic coatings. The latter are prone to fair criticism, because of their fragility and lack of scalability [71], but these significant drawbacks seem to steadily being overcome and many researchers report on the fabrication of scalable, robust and wear-resistant water repellent materials [72][73][74][75][76].…”

One-Step Potentiostatic Deposition of Micro-Particles on Al Alloy as Superhydrophobic Surface for Enhanced Corrosion Resistance by Reducing Interfacial Interactions

“…Enlightened by the natural water-repelling and self-cleaning behaviors of lotus leaves [21,22], fabricating superhydrophobic layers on Al alloys can reduce interfacial interactions with corrosive 2 of 10 mediums, thereby slowing down their corrosion rates, which is a promising anticorrosion method. In general, a superhydrophobic surface can be achieved with a CA larger than 150 • and a SA smaller than 10 • [23][24][25]. Till now, various methods of sol-gel process [26], immersion process [27], in suit growth [28], hydrothermal treatment [29], chemical etching [30], spraying process [31], and laser marking technique [32] have been developed to prepare superhydrophobic Al alloys.…”