Ice repellency behaviour of superhydrophobic surfaces: Effects of atmospheric icing conditions and surface roughness

Momen, Gelareh; Jafari, Reza; Farzaneh, M.

doi:10.1016/j.apsusc.2015.04.180

Cited by 116 publications

(62 citation statements)

References 28 publications

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“…The hardness was about 169 hv and we can assume that the sandblasted specimen should have a similar or higher value. As reported in a previous study, the SHP evidenced remarkable durability for 20 shear stress cycles and showed better performances with respect to several superhydrophobic coatings described in the literature [12,61]. This behavior is thought to be attributable to the presence of the micro-roughness which enhances the hardness of the sample that is, consequently, less exposed to ice abrasion.…”

Section: Durability Of Ice-phobic Propertiessupporting

confidence: 63%

A Novel Simple Anti-Ice Aluminum Coating: Synthesis and In-Lab Comparison with a Superhydrophobic Hierarchical Surface

2020

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A simple process to obtain a slippery surface with anti-ice and ice-phobic properties has been developed and characterized in laboratory. The coating is realized by growing a nanostructured pseudo-boehmite on an aluminum substrate and applying an environmentally compatible final functionalization consisting of a fluorine-free oligomeric short-chain alkylfunctional silane. The resulting surface is conceptually similar to a slippery liquid infused porous surface (SLIP) material, but the porous infrastructure is inorganic and the process to generate it is very simple, rapid and economic. The coating performance in terms of hydrophobicity at room and low temperatures, ice nucleation temperature and ice adhesion forces were assessed in laboratory. Moreover, hydrophobicity persistence was tested after prolonged immersion in acid, basic and saline solutions while the durability of ice-phobic behavior was assessed by repeated shear stress tests. Results are compared with those of a superhydrophobic hierarchical aluminum surface obtained with a fluorinated siloxane. The novel coating shows very good anti-ice properties and relevant durability, with some differences from the fluorinated surface. The novel slippery coating process is promising for industrial applications, also taking into account its environmental compatibility, simplicity and low cost.

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Section: Durability Of Ice-phobic Propertiessupporting

confidence: 63%

A Novel Simple Anti-Ice Aluminum Coating: Synthesis and In-Lab Comparison with a Superhydrophobic Hierarchical Surface

2020

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“…As reported by many literatures, the superhydrophobic structure surfaces remarkably reduce the ice adhesion to 75 and 102 KPa for the HN‐Surface and SN‐Surface, respectively. Comparing with the treatment‐free substrate surface, superhydrophobicity induces ≈90% reduction in ice adhesion, mainly due to special composite interface of solid/ice and air/ice replacing the single solid/ice interface . Figure c illustrates the composite interface of solid/ice and air/ice on the HN‐Surface.…”

Section: Resultsmentioning

confidence: 99%

Anti‐Icing Performance of Superhydrophobic Texture Surfaces Depending on Reference Environments

Shen

Wang

Tao

et al. 2017

Adv Materials Inter

101

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mightily appeal to many researchers to develop an anti-icing method without energy consumption by mimicking the plant surface topographies. [1][2][3][4][5][6] As well known, the famous Lotus Effect is widely used and induces to construct the hierarchical topography of composite micronanostructures in favor of entrapping more air pockets to repel water and finally realize the aim of preventing ice accumulation. [7][8][9][10][11] Also, many theoretical and experimental studies have been reported that the trapped air pockets play a thermal insulation role in preventing the freezing of supercooled water, and cause a remarkable reduction in solid/liquid contact area. [8,9,12,13] The resultant situation is that triggering ice nucleation gets more difficulty due to the increasing energy barrier, finally showing a certain extent of icingdelay performance. [14,15] Furthermore, the air pockets can be remained after freezing and serve as the original microcracks to reduce the ice adhesion strength, resulting in the adhered ice being extremely easily removed. [16][17][18] After a comprehensive insight into these reported literatures, the real anti-icing potential of hierarchical micro-nanostructure superhydrophobic surface needs to be further confirmed in the involved application environments due to the obvious distinction (several orders of magnitude) of the volume of reference supercooled droplets.We, therefore, made great efforts to verify the anti-icing capacity of hierarchical micro-nanostructure surfaces through modeling the application environments, not only the routine analyses in laboratory. Here, this work developed both routes to fabricate the superhydrophobic structure surfaces (see Figure 1a), hierarchical micro-nanostructure and single nanostructure surfaces, which were also labeled as hierarchical micronanostructure surface (HN-Surface) and single nanostructure surface (SN-Surface), respectively. The more detailed operating procedures are provided in Experimental Section. According to the previous experience and classical wetting theory, the HN-Surface is expected to entrap more air pockets underneath the droplets and exhibit more robust water repellence than the SN-Surface. [17,19,20] Also, the anti-icing performance should display the similar situation. The supercooled droplets on HN-Surface will take more time to complete the freezing process, and the produced ice can be easily removed under the action of slight external force due to the lower ice adhesion.Materials decorated by the hierarchical micro-nanostructures similar to lotus leaf surface topographies are firmly considered to possess the substantial anti-icing functions, showing icing-delay and low ice adhesion. Here, the aim of this work is to verify the anti-icing capacity in the actual icing environment containing supercooled airflow. This study, therefore, develops both routes to fabricate the hierarchical micro-nanostructure and single nanostructure superhydrophobic surfaces, and first evaluates their anti-icing capacity based on the routine mea...

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“…Some works showed that highly ordered superhydrophobic materials can remain entirely ice‐free down to −25 °C to −30 °C, and ice accumulated below these temperatures can be easily removed. However, some literatures claim superhydrophobic surfaces are not always good for water repellency and reducing ice adhesion . Surface wettability state over time changes from Cassie–Baxter state to Wenzel state, eventually leading to loss of its superhydrophobic ability.…”

Section: Introductionmentioning

confidence: 99%

Effects of microstructure design on aluminum surface hydrophobic and ice‐retarding properties

Chen

Sun

2017

Asia-Pacific J Chem Eng

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The poor mechanical strength of superhydrophobic surface limits its use in civil aviation. In this work, superhydrophobic surfaces with open and closed microstructure design were prepared, and their hydrophobicity and icephobicity over icing/de-icing cycles were thoroughly studied. For all samples, contact angle decreased and contact angle hysteresis increased over time. However, surface with interconnected hollow honeycomb microstructure design kept its Cassie-Baxter state even after 20 times icing/de-icing cycles, while surface with repeated individual post microscopic unit lost its superhydrophobicity only after six times icing/de-icing cycles. The interconnected hollow honeycomb microstructure design strengthened surface mechanical strength by lowering the damage to microscopic unit. The freezing time for water droplet on surface with interconnected hollow honeycomb microstructure design was only slightly shortened over time. The difference in water/ice-solid contact area for surfaces with different nano-microscale design also led to the difference in wetting and ice-retarding ability. Surface with interconnected hollow honeycomb microstructure design showed the strongest ice-retarding ability followed by surface with interconnected hollow brick, ladder type, and triangle shape microstructure design.

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Ice repellency behaviour of superhydrophobic surfaces: Effects of atmospheric icing conditions and surface roughness

Cited by 116 publications

References 28 publications

A Novel Simple Anti-Ice Aluminum Coating: Synthesis and In-Lab Comparison with a Superhydrophobic Hierarchical Surface

A Novel Simple Anti-Ice Aluminum Coating: Synthesis and In-Lab Comparison with a Superhydrophobic Hierarchical Surface

Anti‐Icing Performance of Superhydrophobic Texture Surfaces Depending on Reference Environments

Effects of microstructure design on aluminum surface hydrophobic and ice‐retarding properties

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