Preparing method and application of super hydrophobic coating with photothermal effect

Abstract

The invention discloses a preparing method of a super hydrophobic coating with a photothermal effect. The preparing method comprises the following steps that 1, dehydrated polycarbonate diol and toluene diisocynate are synthesized under catalysis of dibutyltin dilaurate to obtain prepolymers, and the prepolymers react with perfluorooctanoic alcohol to obtain fluoro-modified polyurethane; 2, the fluoro-modified polyurethane and prussian blue are subjected to ultrasound dispersion to be even and then are applied or sprayed onto a base material, and after drying, the super hydrophobic coating isobtained. According to the preparing method, the fluoro-modified polyurethane synthesized by a specific method is compounded with the prussian blue, so that the prepared super hydrophobic coating hasgood hydrophobic performance and an excellent photothermal effect, and the ice resistance and deicing performance of the coating are improved. The preparing method is simple, no special equipment is needed, the cost is low, and thus the super hydrophobic coating is suitable for industrial production. The invention further discloses application of the super hydrophobic coating with the photothermaleffect in the fields of ice resistance and deicing.

Description

technical field [0001] The invention belongs to the technical field of surface materials, and in particular relates to a preparation method and application of a superhydrophobic coating with photothermal effect. Background technique [0002] Surface properties are one of the most important physical and chemical properties of solid materials, and wettability is a major aspect of material surface properties. Due to the small contact area between the super-hydrophobic surface and water droplets, water droplets can easily slip off the surface. It has broad application prospects in many fields such as anti-frost, anti-frost, anti-icing, anti-adhesion and anti-fouling. Studies have shown that superhydrophobic surfaces have low surface energy and high surface roughness, and superhydrophobic surfaces can be obtained by adjusting the chemical composition and surface structure morphology. [0003] At present, the methods and approaches to prepare superhydrophobic surfaces mainly inc...

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Problems solved by technology

[0003] At present, the methods and approaches to prepare superhydrophobic surfaces mainly include: chemical etching method, phase separation method, electrode deposition method, template method, sol-gel method, plasma treatment and self-assembly, etc., but these technologies generally have defects such as cumbersome steps. , and the preparation process of most superhydrophobic surfaces involves the use of more expensive low surface energy substances, such as silane compounds to reduce the surface energy, and many methods involve special equipment, harsh conditions and long periods, It is difficult to realize the preparation of large-area superhydrophobic coatings, which limits its practical application to a certain extent.

In addition, the currently prepared superhydrophobic coatings can reduce the adhesion strength of ice on the surface, but most of the prepared superhydrophobic coatings cannot resist freezing for a long time, especially when the superhydrophobic surface encounters extremely low ambient temperature and When the humidity is high, the anti-icing performance of the super-hydrophobic surface is not very ideal. Once the surface freezes, it loses its anti-icing performance.

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