Heat Transfer Characteristics of Carbon-Based Photothermal Superhydrophobic Materials with Thermal Insulation Micropores During Anti-icing/Deicing

Abstract

Photothermal deicing is a noncontact, economically, efficient, and environmentally friendly melting/preventing ice method. Obtaining a cheap, easily fabricated material with high photothermal conversion and deicing efficiency is a challenge. Here, carbon-based photothermal superhydrophobic materials with thermal insulation micropores were prepared by using the salt-template. We demonstrate that the microholes array structure can enhance light absorption and hydrophobicity of the material, and the micropores structure can inhibit the heat transfer from the surface to the subcooled substrate, which synergistically greatly enhances the photothermal conversion. A heat transfer model was established to clarify the influence mechanisms of air cushion on interfacial heat transfer during the photothermal anti-icing and deicing process. The selfcleaning, flexibility, mechanical, and chemical stability tests show that the material has the potential for outdoor application. The prepared materials with high photothermal deicing efficiency provide a new way for the anti-icing and deicing of outdoor equipment.

Recent Advances in Multifunctional Photothermal Materials for Solar‐Driven Steam and Energy Generation

“…Reproduced with permission. [60] Copyright 2022, ACS Publications. created by calcining rape pollen are used.…”

“…Figure 4. a) Carbon based superhydrophobic materials equipped with insulating micropores for icing and deicing applications. Reproduced with permission [60]. Copyright 2022, ACS Publications.…”

“…d) TiN NPs-based efficient interfacial SSG. Reproduced with permission [60]. Copyright 2022, ACS Publications.…”

Photo-Thermal Superhydrophobic Sponge for Highly Efficient Anti-Icing and De-Icing

“…The heat generating from the photo-thermal layer transferred the whole coating surface by the conductive layer, but with limited transmission to the substrate material by a thermal-protective layer, which endowed the surface with highly efficient de-icing and de-frosting properties even when a small portion of photo-thermal coating was irradiated under an extremely low temperature. In addition, heat-insulated bulk materials, such as macro-porous photo-thermal xerogel 41 and carbon-based micropore silicone rubber, 42 were developed. The porous bulk material can keep no freeze under faint solar irradiation intensity and melts ice rapidly under 1 kW/m 2 solar irradiation intensity in an extremely low-temperature environment.…”

Preparation of Food Grade Superhydrophobic Coatings Based on Attapulgite Nanorods

“…With increasing the C STA to 11.5 g L −1 , the coating becomes rougher and has a two-tier hierarchical structure as mentioned above (Figures 3c and S1b), which enables the STA@APT coating to stably trap a layer of air at the coating-water interface. 40,41 Meanwhile, the surface energy is further reduced by sufficient STA. Thus, the water drops are in the Cassie−Baxter state with a very small SA.…”