Durable and regenerative superhydrophobic surface using porous nanochannels

Ranjan, Durgesh; Zou, An; Maroo, Shalabh C.

doi:10.1016/j.cej.2022.140527

Cited by 11 publications

(4 citation statements)

References 59 publications

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“…designed a SHS through the CS coating of a silicon substrate with a porous nanochannel geometry and pretreated with silicon oil. [ 69 ] Plastron indicated by the silver appearance remained noticeable on the as‐prepared SHS after being submerged under 10 cm of tap water for 30 consecutive days, and the superhydrophobicity remained unchanged from initial values (WCA 159° and roll off angle 3°). Subsequent application of a tap water jet up to 10.3 m s −1 incurred no noticeable change in WCA and 360 h exposure in 3.5% NaCl led to a very slight reduction in WCA though an increase in roll off angle to 5°.…”

Section: Insights Into Recent Approaches In Obtaining Durable Sh Coat...mentioning

confidence: 99%

“…The effect of CS coating on improving SHS durability (e.g., saltwater, chemicals, and frost attack) was observed in another study. [69] The presence of high aspect ratio nanofeatures with good mechanical strength and high elasticity is a prerequisite for achieving the 'Salvinia effect'. [72] Carbon nanotubes (CNTs) are an excellent candidate due to their outstanding mechanical properties, extremely high aspect ratio (up to 2000), strong adhesion with polymer matrices, and excellent thermal and chemical stability.…”

Section: Pioneering Nanotechnology In Sh Coatingsmentioning

confidence: 99%

“…The effect of CS coating on improving SHS durability (e.g., saltwater, chemicals, and frost attack) was observed in another study. [ 69 ]…”

Section: Advancements and Innovations In Sh Surfaces Design And Fabri...mentioning

confidence: 99%

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Recent Advances in Superhydrophobic Materials Development for Maritime Applications

Tang,

Tian,

Molino

et al. 2024

Advanced Science

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Underwater superhydrophobic surfaces stand as a promising frontier in materials science, holding immense potential for applications in underwater infrastructure, vehicles, pipelines, robots, and sensors. Despite this potential, widespread commercial adoption of these surfaces faces limitations, primarily rooted in challenges related to material durability and the stability of the air plastron during prolonged submersion. Factors such as pressure, flow, and temperature further complicate the operational viability of underwater superhydrophobic technology. This comprehensive review navigates the evolving landscape of underwater superhydrophobic technology, providing a deep dive into the introduction, advancements, and innovations in design, fabrication, and testing techniques. Recent breakthroughs in nanotechnology, magnetic‐responsive coatings, additive manufacturing, and machine learning are highlighted, showcasing the diverse avenues of progress. Notable research endeavors concentrate on enhancing the longevity of plastrons, the fundamental element governing superhydrophobic behavior. The review explores the multifaceted applications of superhydrophobic coatings in the underwater environment, encompassing areas such as drag reduction, anti‐biofouling, and corrosion resistance. A critical examination of commercial offerings in the superhydrophobic coating landscape offers a current perspective on available solutions. In conclusion, the review provides valuable insights and forward‐looking recommendations to propel the field of underwater superhydrophobicity toward new dimensions of innovation and practical utility.

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Section: Insights Into Recent Approaches In Obtaining Durable Sh Coat...mentioning

confidence: 99%

Section: Pioneering Nanotechnology In Sh Coatingsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in Superhydrophobic Materials Development for Maritime Applications

Tang,

Tian,

Molino

et al. 2024

Advanced Science

View full text Add to dashboard Cite

show abstract

“…Superhydrophobic surfaces have properties such as anti-frost [ 10 ], anti-corrosion [ 11 ], self-cleaning [ 12 ], anti-icing [ 13 ], fluid drag reduction [ 14 ], and enhanced condensation heat transfer [ 15 ]. Due to their extremely low surface energy [ 16 ], superhydrophobic surfaces have great potential for mitigating dust deposition [ 17 ]. Zhang et al used superhydrophobic coatings for droplet dust removal, which in turn improved photovoltaic efficiency, and found that the photovoltaic efficiency could be increased by 20% per MW of PV plant [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability

Shu

et al. 2023

Micromachines

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The self-cleaning ability of superhydrophobic metal surfaces has attracted extensive attention. The preparation of superhydrophobic material using the coating method is a common processing method. In this experiment, aluminum fins were processed by laser etching and perfluorinated two-step coating. The aluminum surface was modified using a femtosecond laser and 1H,1H,2H,2H- perfluorooctane triethoxysilane (PFOTES). A superhydrophobic aluminum surface with excellent mechanical stability and self-cleaning properties was obtained with the superhydrophobic contact angle (WCA) of 152.8° and the rolling angle (SA) of 0.6°. The results show that the superhydrophobic surface has an excellent cleaning effect compared with an ordinary surface in unit time. Then, a wear resistance test of the superhydrophobic surface was carried out by using the physical wear method. The results show that physical wear had a low influence on the hydrophobic property of the specimen surface. Finally, the Vickers hardness analysis found that the superhydrophobic surface hardness was significantly better than the ordinary surface hardness compared with the superhydrophobic surface hardness. Based on the excellent self-cleaning properties, wear resistance, and robustness of superhydrophobic materials, the laser-etched and perfluorinated superhydrophobic aluminum fins designed and manufactured in this study have broad application prospects in improving the heat transfer efficiency of finned heat exchangers.

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High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces

Jeung,

Yun,

Park

et al. 2024

Adv Materials Inter

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Superhydrophobic surfaces (SHS), with their exceptional water‐repellent properties, have attracted great interest due to their versatile applications. The robustness of SHS has emerged as an essential issue for practical applications, as SHS are directly exposed to various harsh environments, such as continuous raindrop impact, corrosive media, and extreme temperatures. Polyimide (PI) is an ideal candidate for robust SHS due to its superior mechanical, thermal, and chemical properties. However, the low processability of PI in surface microstructuring has limited its application in SHS. In this study, a high‐yield and cost‐effective fabrication method for constructing high‐aspect‐ratio PI microstructures has been developed by controlling the template surface treatment, precursor molecular weight, and vacuum process. This approach achieves an exceptional yield rate of 99.8% and an aspect ratio of 10.7, enabling the construction of various microstructures. The SHS is demonstrated by fabricating microstructures on PI surfaces using the proposed method. The PI SHS exhibits a water contact angle of up to 162° and a roll‐off angle of less than 9°. The water repellency withstands 100 tape peeling tests and remains stable after continuous exposure to temperatures up to 250 °C and various chemical reagents for 60 days, which presents excellent robustness against environmental factors.

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Durable and regenerative superhydrophobic surface using porous nanochannels

Cited by 11 publications

References 59 publications

Recent Advances in Superhydrophobic Materials Development for Maritime Applications

Recent Advances in Superhydrophobic Materials Development for Maritime Applications

Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability

High‐Yield, Cost‐Effective Fabrication of High‐Aspect‐Ratio Polyimide Microstructures for Robust Superhydrophobic Surfaces

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