Recent progresses in super-hydrophobicity and micro-texturing for engineering applications

Abstract

Increasing interests have been prevalent lately among the research fraternity for the development of superhydrophobic surfaces considering the favorable properties exuded by them. Recently, anti-microbial superhydrophobic coatings have been employed effectively in anti-biofouling, corrosion resistance, and self-cleaning, anti-reflecting coating, biomedical and cavitation erosion applications. Further, patterned topology by micro/nano surface texturing has been perceived as an engineering opportunity to enhance the surface performance and has opened various avenues for exploration. This work reports the recent research findings pertaining to the concept of superhydrophobicity and micro-texturing particularly in the context of their application for the impediment of corrosion in submerged components. The comprehensive review on superhydrophobic surfaces and micro-texturing suggests that the integrated application of these surface modification techniques for mechanical interlocking of deposited coating.

Super‐liquid‐repellent thin film materials for low temperature latent heat thermal energy storage: A comprehensive review of materials for dip‐coating

“…133 The dip-coating process described in Section 2.2.2 is well adapted for achieving hierarchical surface texture. Technologies (eg, photolithography 134 and laser-based texturing 135 ) that can produce well-defined microarray-like surface texture 136 such as those in Figure 3D,E are presently expensive to scaleup for STF applications demanding larger surfaces. The fabrication of STF surfaces typically involves four processes, namely: (a) cleaning and surface pretreatment, (b) creating surface texture, (c) applying thin film materials or coatings and (d) post-treatment of the thin film.…”

“…The dip‐coating process described in Section 2.2.2 is well adapted for achieving hierarchical surface texture. Technologies (eg, photolithography 134 and laser‐based texturing 135 ) that can produce well‐defined microarray‐like surface texture 136 such as those in Figure 3D,E are presently expensive to scaleup for STF applications demanding larger surfaces.…”

Advances in the Fabrication and Characterization of Superhydrophobic Surfaces Inspired by the Lotus Leaf

“…One of the major drawbacks to the dip-coating technique is the amount of solvent needed, causing considerable waste. Depending on the scale and compatibility of the substrate to the coating method, spray-coating can be easier and more efficient than spin- or dip-coating [ 21 , 54 , 59 , 60 , 61 ]. Furthermore, using the spray-coating technique, if an SH surface is damaged (for e.g., because of surface abrasion), it can be repaired by local spraying of the coating solution.…”

“…Laser processing is an efficient, facile, and non-contact method for fabricating various complex structures with high precision [ 123 ]. Compared to conventional methods (like spray coating, dip coating and chemical etching), laser processing techniques are faster, and the fabricated structures are more stable [ 60 ]. Generally, sample preparation, harsh environment, photomasks and hazardous chemicals are not required in laser processing as opposed to other techniques.…”

Tribological Behavior of Bioinspired Surfaces

“…Although there are numerous instances, one of the most exciting areas where biomimicry has made a substantial contribution is the creation of superhydrophobic surfaces [ 8 , 9 ]. To obtain functional characteristics such as self-cleaning, non-wettable, anti-icing surfaces, lowering drag in submarines and other vessels, and for the self-propulsion of liquids in micro-channels, superhydrophobicity is necessary [ 10 ]. In addition to low adhesion and friction characteristics offered by superhydrophobic materials, nature has also devised other modulation strategies such as SLIPS (Slippery Liquid-infused Porous Surfaces), and anti-wear surfaces for sustaining extreme tribological challenges [ 11 ].…”