Superhydrophobic Surface Based on Assembly of Nanoparticles for Application in Anti-Icing under Ultralow Temperature

Abstract

A new class of superhydrophobic surface based on assembly of nanoparticles were fabricated for improving mechanical durability and anti-icing performance under ultra-low temperature. Furthermore, the anti-icing performance and mechanism of the yielded superhydrophobic surface was investigated by a high speed video and thermal infrared imaging equipment. The frozen time of water droplets could be prolonged to 372.0s when exposed glass slides with superhydrophobic surface to an ultra-low temperature of -40.0℃. This outstanding anti-icing performance is attributed to the unique structure of the superhydrophobic surface based on assembly of nanoparticles, which possesses good free-energy barrier and low heat transfer rate. This study thus opens up an avenue for the design and fabrication of superhydrophobic surface with good durability and anti-icing performance under ultra-low temperature.

A Passive Anti-icing Strategy Based on a Superhydrophobic Mesh with Extremely Low Ice Adhesion Strength

“…( 1)) compared to low contact angle surfaces. It has been reported that the fraction of contact between a liquid and substrate in superhydrophobic surfaces is less than 10% [31,32] . This low interfacial surface area leads to a lower heat transfer rate [27][28][29] .…”

Superhydrophobic materials used for anti-icing Theory, application, and development

“…At the same time, PVA coating covers some nonhomogeneous nuclear points on the surface of micro and nano structures, so that the hydroxyl group in PVA can form hydrogen bonds with water molecules, which destroys the arrangement of water molecules at the interface, affects the freezing process of water, and ultimately reduces the freezing temperature ( Wu et al., 2019a ). However, when the particle spacing is greater than 8.82 μm, the water droplets on the surface will no longer be in the Cassie-Baxter state ( Cassie and Baxter, 1944 ; Qi et al., 2020c ), and the hydrophilic PVA will increase the contact area between the surface and water, resulting in the increase of freezing temperature of the water droplets. The results show that the nucleating agent has synergistic anti-icing effect with SH micro-nano structure surface under the best matching conditions.…”

Preparation of Degradable Superhydrophobic Mg/P/Z/F/H Composite Materials and Their Anticorrosion

“…With special solid-liquid adhesion, self-cleaning, [1][2][3][4][5][6][7][8][9][10][11] anti-icing, [4,6,[7][8][9][10][11] anti-corrosion, [5,9,12,13] antibacterial and so on, [14][15][16] multifunctional super-antiwetting surfaces have recently attracted scientists' attentions to research superhydrophobic surfaces both in preparations and applications. And the present superhydrophobic materials researches focus on the undegradable polymer (epoxy resin, polyurethane, polytetrafluoroethylene , polyvinyl chloride, perfluoropolyalkylether.…”