Environmentally-safe and transparent superhydrophobic coatings

Mates, Joseph E.; Ibrahim, Rushdan; Vera, Andrea Rodríguez; Guggenheim, Stephen; Qin, Jian; Calewarts, D.; Waldroup, Don; Megaridis, Constantine M.

doi:10.1039/c5gc02725j

Cited by 58 publications

(43 citation statements)

References 46 publications

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“…A few strategies have been reported about preparing water‐based superhydrophobic coatings and even water‐based superamphiphobic coatings. [ 37–44 ] The focus of the present studies is on the preparation of these coatings. However, high performances of water‐based superhydrophobic coatings are neglected which are the key factors in wide, long‐term, and efficient application, due to the difficulty in achieving them.…”

Section: Introductionmentioning

confidence: 99%

Water‐Based Robust Transparent Superamphiphobic Coatings for Resistance to Condensation, Frosting, Icing, and Fouling

Song

Cheng

et al. 2020

Adv Materials Inter

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high fraction of the total energy consumption. For example, air-conditioners and refrigerators account for more than 10% and 32% of the total residential energy consumption in China, respectively. [2,3] Therefore, improvement of the energy efficiency characterizing heat exchangers plays a crucial role in reducing energy consumption. However, the occurrence of condensate films, frost layers, and fouling on the surfaces of conventional hydrophilic heat exchangers acts as a thermal barrier to significantly reduce in the heat transfer. One alternative, that is, a periodic heating process for complete melting of the frost, results in extra energy consumption. In addition, wet surfaces are prone to the dust deposition, breeding of bacteria, and corrosion acceleration.Inspired by nature, [4][5][6][7] superhydrophobic surfaces with extreme repellency to water have attracted significant interest, owing to their potential applications in anticondensation, anti-frosting, anti-icing, antifogging, and self-cleaning activities. [8][9][10][11][12][13][14][15][16][17][18][19][20] Biomimetic superhydrophobic surfaces can be prepared via different approaches, including reactive ion etching, [21] chemical/physical processing, [22][23][24][25] lithographing, [26,27] and coating. [28][29][30][31][32][33] Among these approaches, the coating approach has been widely applied, owing to its simple preparation process, low equipment requirement, and wide application range. However, organic solvents, such as ethanol, acetone, or butyl acetate, are frequently used to dissolve or disperse low surface energy substances during the preparation process. [34,35] Compared with organic solvents, water is a green, safe, and economical solvent. [36] A few strategies have been reported about preparing waterbased superhydrophobic coatings and even water-based superamphiphobic coatings. [37][38][39][40][41][42][43][44] The focus of the present studies is on the preparation of these coatings. However, high performances of water-based superhydrophobic coatings are neglected which are the key factors in wide, long-term, and efficient application, due to the difficulty in achieving them. For example, micro-sized or smaller condensate dewdrops on most water-based superhydrophobic coatings occur in the Wenzel state, although the contact angles (CAs) and sliding angles (SAs) of macro water droplets on these coatings are >150 and <10, respectively. [45] The Wenzel-state dewdrops may lead to Due to the considerable demand for improving energy conservation and emission reduction, superhydrophobic coatings mainly derived from organic solvents have attracted significant interest, based on their potential role in enhancing heat transfer. Although water-based coatings are relatively safe and economical, and contain low volatile organic compounds (VOCs), the realization of coatings with excellent anti-condensation, anti-frosting, antiicing, and passive self-cleaning properties remains challenging, owing to the Wenzel state of small-sized condensate microdrops. Herein, ...

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Section: Introductionmentioning

confidence: 99%

Water‐Based Robust Transparent Superamphiphobic Coatings for Resistance to Condensation, Frosting, Icing, and Fouling

Song

Cheng

et al. 2020

Adv Materials Inter

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“…In efforts to mitigate soiling and maintain clean surfaces, many studies have explored natural soiling of reective surfaces and environmentally friendly cleaning methods in the eld. [1][2][3]5,[8][9][10][11][12][13][14] Recent progress in nanotechnology (e.g., transparent superhydrophobic [SP] coatings 6,[15][16][17][18][19][20][21][22] ) suggests a potential breakthrough in a unique surface self-cleaning technology that could signicantly enhance the reliability and efficiency of solar panel glass and solar mirrors while drastically reducing cleaning and maintenance costs. A reduction in maintenance costs as a result of self-cleaning surfaces could have a signicant impact on energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Transparent superhydrophilic and superhydrophobic nanoparticle textured coatings: comparative study of anti-soiling performance

et al. 2019

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“…23 Thus, it is very desirable and valuable to fabricate superhydrophobic surfaces that maintain self-cleaning property both in air and in oil environments via an easy and fluoride-free method.…”

Section: Introductionmentioning

confidence: 99%

One-Step Fabrication of Non-Fluorinated Transparent Super-Repellent Surfaces with Tunable Wettability Functioning in Both Air and Oil

Long

Peng

Yang

et al. 2017

ACS Appl. Mater. Interfaces

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In this paper, we have developed a one-step thermal treatment of polydimethylsiloxane (PDMS) liquid to create transparent super-repellent surface (TSS) and super-repellent powder. They are super-repellent toward water and ethylene glycol. During the one-step thermal treatment, PDMS soot is generated and deposited onto a glass slide (GS) surface to fabricate the TSS without fluorosilane modification. The facilely obtained TSS presented superhydrophobicity and self-cleaning property when immersed into very low surface tension oils such as petroleum ether, hexadecane, peanut oil, and dodecane. Interestingly, by controlling heating time and temperature, wettability of the treated GS surface and the remained white powder can be regulated. The mechanism of tunable wettability was revealed and analyzed by investigating the variations of surface morphology and chemical composition. More importantly, TSS was able to repel highly corrosive aqua regia and saturated NaOH solutions. TSS maintained excellent superhydrophobicity even after chemical and mechanical damages. This simple thermal deposition method was also applicable for other thermally stable substrates to achieve super-repellency, which are believed to find very promising applications.

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Environmentally-safe and transparent superhydrophobic coatings

Abstract: An environmentally-safe, water-borne coating consisting of titania nanoparticles and fluorine-free polyethylene copolymers, forming a transparent, substrate-independent, superhydrophobic water barrier.

Cited by 58 publications

References 46 publications

Water‐Based Robust Transparent Superamphiphobic Coatings for Resistance to Condensation, Frosting, Icing, and Fouling

Water‐Based Robust Transparent Superamphiphobic Coatings for Resistance to Condensation, Frosting, Icing, and Fouling

Transparent superhydrophilic and superhydrophobic nanoparticle textured coatings: comparative study of anti-soiling performance

One-Step Fabrication of Non-Fluorinated Transparent Super-Repellent Surfaces with Tunable Wettability Functioning in Both Air and Oil

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