On a simplified method to produce hydrophobic coatings for aeronautical applications

Piscitelli, Filomena; Tescione, F.; Mazzola, Luca; Bruno, Giovanni; Lavorgna, Marino

doi:10.1016/j.apsusc.2018.04.062

Cited by 27 publications

(19 citation statements)

References 43 publications

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“…The developed superhydrophobic coating was prepared starting from the formulation described in a previous work [19] and slightly modified in order to improve its durability. In this regard, other details about the performed changes cannot be disseminated in this manuscript.…”

Section: Methodsmentioning

confidence: 99%

“…As an additional crosscheck, the determined optimal contact angles, namely, θ 1 ,θ 2 , instead of the mean values of the experimentally measured angles measured with Water and Diiodomethane, were introduced in the widespread linearized equations [19][20][21][22][23][24][25][26]: (6) and the required polar and dispersive components of the solid SFE, were obtained as the graphic solution of the equations system (6) through the intercept point between the two straight line (r 1 and r 2 ) identified by the following angular coefficients and points:…”

Section: Methodsmentioning

confidence: 99%

“…The SEM images of coated samples 2 and 7 (Table 1), acquired at different magnifications (125-500,000×) are displayed in Figure 14 and Figure 15, respectively. It highlights that at the lowest magnification (125×), both samples exhibit characteristic sponge-like structures [15,19,32,[34][35][36], with the formation of air pockets, which enhance the superhydrophobicity. Samples differ in the density of the sponge-like structures.…”

Section: D Samples' Morphologymentioning

confidence: 97%

“…The effort of the present work was to develop a superhydrophobic coating for metallic substrates with a simplified and non-expensive method, which could be employed as a usual paint able to prevent/reduce the formation of ice, especially on small aircraft [19]. The newly formulated superhydrophobic coating consists of nanostructured layers able to generate hierarchical micro/nano-structured roughness, and reduce the surface free energy, which as previously declared, are the two main factors useful to making a superhydrophobic surface.…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Coatings as Anti-Icing Systems for Small Aircraft

Piscitelli

Chiariello

Dabkowski³

et al. 2020

Aerospace

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Traditional anti-icing/de-icing systems, i.e., thermal and pneumatic, in most cases require a power consumption not always allowable in small aircraft. Therefore, the use of passive systems, able to delay the ice formation, or reduce the ice adhesion strength once formed, with no additional energy consumption, can be considered as the most promising solution to solve the problem of the ice formation, most of all, for small aircraft. In some cases, the combination of a traditional icing protection system (electrical, pneumatic, and thermal) and the passive coatings can be considered as a strategic instrument to reduce the energy consumption. The effort of the present work was to develop a superhydrophobic coating, able to reduce the surface free energy (SFE) and the work of adhesion (WA) of substrates, by a simplified and non-expensive method. The developed coating, applied as a common paint with an aerograph, is able to reduce the SFE of substrates by 99% and the WA by 94%. The effects of both chemistry and surface morphology on the wettability of surfaces were also studied. In the reference samples, the higher the roughness, the lower the SFE and the WA. In coated samples with roughness ranging from 0.4 and 3 µm no relevant variations in water contact angle, nor in SFE and WA were observed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: D Samples' Morphologymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Superhydrophobic Coatings as Anti-Icing Systems for Small Aircraft

Piscitelli

Chiariello

Dabkowski³

et al. 2020

Aerospace

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“…The limit for the lowest adhesion properties is found with so-called liquid-repellent surfaces [5]. These surfaces may incorporate further applications such as anti-icing [6], self-cleaning [7], anti-corrosion [8], drug reduction [9], anti-fouling and anti-biofouling [10], microfluidic device construction [11], anti-reflective [12], and antibacterial effects [13]. In the literature, one may find a wide variety of methods to obtain superhydrophobic surfaces, including silanization by liquid or chemical vapor deposition (CVD) [14], sol-gel coatings [15], chemical immersion [16], production of roughness on inherent hydrophobic polymer layers [17], nanoparticle coatings [18], micro-machining [19], layer-by-layer deposition [20], electrodeposition [21], lithography [22], chemical etching [23], and silicone coatings [24].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Cerium-Based Coatings on Al-Mg Alloys and Aluminized Steel

et al. 2019

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Aluminum-magnesium (Al-Mg) alloy and aluminum-coated steel (aluminized steel) are typically used for the manufacturing of baking trays and molds. For these applications, these materials must be modified to develop release and hydrophobic properties. With this aim, the bare substrates are typically coated with low-surface energy materials such as fluoropolymers, elastomers, or sol-gel layers. In this work, some alternative strategies to prepare these functional surfaces are presented. We used three-step processes involving (i) micro-texturing, (ii) nano layer deposition through immersion and electrodeposition, and (iii) hydrophobization. The raw substrates were sanded or sandblasted at the micro scale, accordingly. Texturization at the nano scale was achieved with a cerium layer formed by electrodeposition or solution immersion. The cerium layers were hydrophobized with fatty acids. The wetting properties of the samples were studied with tilting-plate and bouncing drop methods. We measured the surface roughness of the samples by contact profiling and analyzed their surface morphology using a field emission scanning electron microscope (FESEM). The elemental chemical composition of the samples was analyzed by energy-dispersive X-ray spectroscopy (EDX). The wettability results indicated that the best performance for the Al-Mg substrates was reached by sandblasting and later immersion in a cerium nitrate solution. For aluminized steel substrates, the best results were obtained with both electrodeposition and immersion methods using a cerium chloride solution.

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Design and preparation of durable anti‐icing polysilazane coatings with abrasion and UV resistance

Kuang

Huang

et al. 2022

J of Applied Polymer Sci

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This work developed a method to enhance the durability of anti‐icing performance of a coating to endure abrasion and UV exposure, through grafting functional polydimethylsiloxane (PDMS) to TiO2 particles and further reacting with polysilazane (PSZ) pre‐polymer. This method remarkably improved the anti‐icing properties of PSZ‐based coatings evaluated by freezing delay time and ice removal shear strength. After either surface abrasion for 50 cycles or UV exposure for 100 h, the modified coatings exhibited ice shear strength increase by only 10.44 and 6.44 kPa respectively, significantly lower comparing to that of the coatings containing 30% TiO2 with no PDMS modification (29.69 and 11.88 kPa, respectively). Such strengthened durability of anti‐icing performance is attributed to the PDMS molecules bridging PSZ rigid segments and TiO2 compositions, which formed a hydrophobic cross‐linking network structure. The durable anti‐icing technique developed herein shall appeal to many outdoor applications of facilities and infrastructures.

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On a simplified method to produce hydrophobic coatings for aeronautical applications

Cited by 27 publications

References 43 publications

Superhydrophobic Coatings as Anti-Icing Systems for Small Aircraft

Superhydrophobic Coatings as Anti-Icing Systems for Small Aircraft

Superhydrophobic Cerium-Based Coatings on Al-Mg Alloys and Aluminized Steel

Design and preparation of durable anti‐icing polysilazane coatings with abrasion and UV resistance

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